JP7242189B2 - Cut flower sterilization method and sterilization unit - Google Patents

Description

An embodiment of the present invention relates to a cut flower sterilization method and a sterilization unit.

As a way to keep cut flowers fresh, there is a method of adding a preservative solution when the flowers are landed.

However, when the preservative solution is used, the leaves/stems are effective, but the petals are not directly sterilized, so there is no effect of removing fungi adhering to the petals. In this case, the microbes, which are so small that they cannot be seen at the time of shipment, increase during transportation, and by the time they arrive at intermediate wholesalers or retailers, they may cause disease to the extent that they cannot be used for ornamental purposes. In addition, when sterilizing cut flowers, it is necessary to treat not only the top surface of the petals but also the back surface of the petals. Acidic electrolyzed water (hypochlorous acid water) is effective in suppressing disease (for example, gray mold on roses), but there is also the problem that water remains on the surface of cut flowers after hypochlorous acid is deactivated in immersion treatment. At present, it is not so widespread as to be fully introduced for use in sterilizing cut flowers.

JP-A-2005-8542 JP 2017-56379 A Japanese Patent Publication No. 2014-518844 WO2015/071995

An object of an embodiment of the present invention is to efficiently sterilize cut flowers after harvesting.

According to the embodiment, when the transportation period is at least one day, the hypochlorous acid water vaporized substance is added to the cut flowers only after harvesting and before transportation between the production and sale of cut flowers. Provided is a method for sterilizing cut flowers, characterized by supplying until the total arrival amount (HClO arrival amount per unit time in the ambient atmosphere of the cut flowers x treatment time) is 3500 μg/m ² or more and 23000 μg/m ² or less. .

It is a flow chart showing distribution from production to sales of cut flowers. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram schematically showing a configuration example of a cut flower sterilization system applicable to an embodiment; BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic showing an example of the management system of the cut flower provided with the sterilization system applicable to embodiment. FIG. 4 is a flowchart showing a cut flower processing method in the cut flower management system of FIG. 3 ; FIG. 3 is a schematic diagram showing another example of a cut flower management system equipped with a sterilization system applicable to the embodiment; FIG. 6 is a flowchart showing a cut flower processing method in the cut flower management system of FIG. 5 ; BRIEF DESCRIPTION OF THE DRAWINGS It is a figure showing an example of the electrolyzed water production|generation apparatus which can produce|generate the electrolyzed water used for embodiment. It is a graph showing the relationship between the number of elapsed days and the number of lesions equivalent to 2 mm in diameter when cut flowers are stored in a high-humidity space after sterilization. It is a graph showing the relationship between the number of elapsed days and the number of lesions equivalent to 2 mm in diameter when cut flowers are stored in a high-humidity space after sterilization. It is a graph showing the relationship between the number of elapsed days and the number of lesions equivalent to 2 mm in diameter when cut flowers are stored in a high-humidity space after sterilization. It is a graph showing the relationship between the number of elapsed days and the number of lesions equivalent to 2 mm in diameter when cut flowers are stored in a high-humidity space after sterilization. FIG. 2 is a graph showing the relationship between the total amount of HClO reaching cut flowers and the number of lesions corresponding to 2 mm in diameter generated on the petals of cut flowers on the first day of high-humidity storage. FIG. 2 is a graph showing the relationship between the total amount of HClO reaching cut flowers and the number corresponding to 2 mm-diameter lesions generated on the petals of cut flowers on the second day of high-humidity storage. FIG. 10 is a graph showing the relationship between the total amount of HClO reaching cut flowers and the number corresponding to 2 mm diameter lesions generated on the petals of cut flowers on the third day of high-humidity storage. FIG. 2 is a graph showing the relationship between the total amount of HClO reaching cut flowers and the number of lesions corresponding to 2 mm in diameter generated on the petals of cut flowers on the 4th day of high-humidity storage. It is a graph showing the relationship between the number of elapsed days and the number of lesions equivalent to 2 mm in diameter when cut flowers are stored in a high-humidity space after sterilization. It is a graph showing the relationship between the number of elapsed days and the number of lesions equivalent to 2 mm in diameter when cut flowers are stored in a high-humidity space after sterilization. It is a graph showing the relationship between the number of elapsed days and the number of lesions equivalent to 2 mm in diameter when cut flowers are stored in a high-humidity space after sterilization. FIG. 2 is a graph showing the relationship between the total amount of HClO reaching cut flowers and the rate of occurrence of lesions on the petals of cut flowers on the first day of high-humidity storage. FIG. 2 is a graph showing the relationship between the total amount of HClO reaching cut flowers and the rate of occurrence of lesions on the petals of cut flowers on the second day of high-humidity storage. FIG. 3 is a graph showing the relationship between the total amount of HClO reaching cut flowers and the rate of occurrence of lesions on the petals of cut flowers on the third day of high-humidity storage. FIG. 4 is a graph showing the relationship between the total amount of HClO reaching cut flowers and the rate of occurrence of lesions on the petals of cut flowers on day 4 of high-humidity storage. It is a schematic diagram showing an example of a sterilization unit applicable to the cut flower sterilization method according to the second embodiment. It is a sterilization unit applicable to the cut flower sterilization method according to the second embodiment. It is a graph showing the relationship between the number of elapsed days and the number of lesions equivalent to 2 mm in diameter when cut flowers are stored in a high-humidity space after sterilization. FIG. 2 is a graph showing the relationship between the total amount of HClO reaching cut flowers and the number of lesions corresponding to 2 mm in diameter generated on the petals of cut flowers on the first day of high-humidity storage. FIG. 2 is a graph showing the relationship between the total amount of HClO reaching cut flowers and the number corresponding to 2 mm-diameter lesions generated on the petals of cut flowers on the second day of high-humidity storage. FIG. 10 is a graph showing the relationship between the total amount of HClO reaching cut flowers and the number corresponding to 2 mm diameter lesions generated on the petals of cut flowers on the third day of high-humidity storage. FIG. 2 is a graph showing the relationship between the total amount of HClO reaching cut flowers and the number of lesions corresponding to 2 mm in diameter generated on the petals of cut flowers on the 4th day of high-humidity storage.

Embodiments will be described below with reference to the drawings.

Embodiments include the cut flower sterilization method according to the first embodiment and the cut flower sterilization method according to the second embodiment.

In the cut flower sterilization method according to the first embodiment, the hypochlorous acid water vaporized substance is added to the cut flowers after harvest and before transportation so that the total amount of HClO reaches 260 μg/m ² or more and 42000 μg/m ² or less. supply up to

The total HClO arrival amount (μg/m ² ) is a value obtained by integrating the unit time HClO arrival amount μg/(m ² min) in the atmosphere surrounding the cut flower and the supply time. refers to the weight of hypochlorous acid that reaches

Further, the amount of HClO reached per unit time μg/(m ² ·min) means the weight of HClO that reaches per unit area per unit time.

The timing of performing the sterilization treatment of cut flowers according to the first embodiment is from after harvest to before transportation.

FIG. 1 shows a flow diagram representing the distribution from production to sales of cut flowers.

As shown in the figure, in the production stage of cut flowers, in general, the cut flowers obtained by flower production (BL11) and harvesting (BL12) by the producer are landed (BL13), and the bouquet etc. are adjusted (BL14), And after packing (BL15), it is stored at a low temperature until shipment and transported (BL16).

The transported cut flowers are delivered to consumers through markets (BL17), intermediate wholesalers (BL18), and retail stores (BL19). In addition, there are cases where the products are directly transported from the market to retailers, etc. without going through intermediate wholesalers, or where producers sell directly to consumers, for example, via Internet sales, etc., and market (BL17), intermediate wholesalers (BL18), retailers, etc. ( In some cases, it reaches the consumer without going through BL19).

Post-harvest to pre-transportation means after harvesting (BL12) in the production stage, before transporting (BL16), landing (BL13), adjusting bouquets (BL14), and packing (BL15). It corresponds to either timing. These operations are performed not only by producers, but also by purchasers such as agricultural cooperatives and trading companies.

For example, when sterilizing at the stage of unloading (BL13), for cut flowers in a state in which only the roots are soaked in the bucket in the refrigerator, HClO total Vaporized hypochlorous acid water can be supplied until the arrival amount reaches an arbitrary value. Also, for example, when performing sterilization at the stage of flower bouquet (BL14), take it out of the refrigerator and immediately before performing flower bouquet, vaporize hypochlorous acid water until the total amount of HClO reaches an arbitrary value. Substances can be supplied.

In the case of domestic transportation, after shipment from the producer, it takes 1-2 days to reach the consumer via transportation (BL16), market (BL17), intermediate wholesaler (BL18), retail store, etc. (BL19). . If the producer sells directly to the consumer through internet sales, etc., it may take only one day. In addition, it takes about 3 to 4 days to transport overseas. During this process, the cold chain is broken, and if conditions such as high humidity facilitate the growth of bacteria, there is a risk of diseases such as gray mold.

This gray mold is a disease that occurs in many cut flowers such as roses. Since the number of spots increases rapidly and may affect surrounding flowers during transportation, it is desired to suppress the number of spots to 10 or less, preferably 4 or less, more preferably 1 or less.

The equivalent number of 2 mm diameter lesions is a numerical value obtained by the following gray mold measurement criteria.

Gray mold measurement criteria The surface area of the entire flower is assumed to be equivalent to 5 petals (face) of 30 x 40 ^mm2 = 6000 ^mm2 .

The surface area of a lesion less than 2 mm in diameter is calculated as 3 mm ² .

The surface area of a lesion less than 4 mm in diameter is calculated as 15 mm ² .

The surface area of a lesion less than 9 mm in diameter is calculated as 75 mm ² .

The diameter of lesions is visually classified into 2, 4, and 9 mm, and the number of lesions is measured for each. If there are likely to be more than 20 individual lesions (especially 2 mm diameter lesions), measure in units of 10-100. When the browned portion is large, the ratio shown per petal is visually measured, and the maximum value is 5 petals.

The lesion area is obtained from the measured value, and the number is converted into the number corresponding to the number of lesions with a diameter of 2 mm (number of lesions with a diameter of 2 mm) for evaluation.

According to the first embodiment, when the amount of HClO reached per unit time is 5 to 350 μg/(m ² ·min), the vaporized substance of hypochlorous acid water is supplied until the total amount of HClO reaches 260 μg/m ² or more. For example, even if the high humidity continues for one day, the number of gray mold lesions equivalent to 2 mm in diameter can be suppressed to 4 or less, and if the supply reaches 3500 μg/m ² or more, the number equivalent to 2 mm in diameter lesions can be suppressed. can be suppressed to one or less.

In addition, after harvesting and before transportation, the hypochlorous acid water vaporized substance is supplied to sterilize the cut flowers until the total amount of HClO reaches 4500 μg / m ² or more, so that the high humidity condition continues for 2 days. However, it is possible to suppress the number equivalent to 2 mm diameter lesions to 10 or less, and when 8000 μg/m ² or more is supplied, the number equivalent to 2 mm diameter lesions can be suppressed to 4 or less, and further 15000 μg/m ² If the above is supplied, the number corresponding to 2 mm diameter lesions can be suppressed to 1 or less. If it can be stored for two days, it is possible to prevent the occurrence of lesions during the period from shipment to distribution to retail store sales.

In addition, when the high humidity continues for 3 days, if the total amount of HClO reached is 8500 μg/m ² or more, the number of lesions equivalent to 2 mm in diameter can be suppressed to ¹⁰ or less, The number corresponding to 2 mm lesions can be suppressed to 4 or less, and the number corresponding to diameter 2 mm lesions can be suppressed to 1 or less by supplying 22000 μg/m ² or more.

In addition, when the high humidity continues for 4 days, if the total amount of HClO reached is 14000 μg/m ² or more, the number of lesions equivalent to ² mm in diameter can be suppressed to 10 or less, The number corresponding to 2 mm lesions can be suppressed to 4 or less, and the number corresponding to diameter 2 mm lesions can be suppressed to 1 or less by supplying 23000 μg/m ² or more.

According to the first embodiment, when the amount of HClO reached per unit time is greater than 350 μg / (m ² · min) and 700 μg / (m ² · min) or less, hypochlorous acid is applied to cut flowers after harvest and before transportation. If the vaporized substance of chloric acid water is supplied until the total amount of HClO reaches 260 μg/m ² or more, even if the high humidity condition continues for one day, the number of gray mold lesions equivalent to 2 mm in diameter can be suppressed to 4 or less. , 3500 μg/m ² or more, the number corresponding to 2 mm diameter lesions can be suppressed to 1 or less.

In addition, for cut flowers after harvest and before transportation, even if the high humidity condition continues for two days, the vaporized substance of hypochlorous acid water is supplied until the total amount of HClO reaches 1600 μg/m ² or more to sterilize. By this, it is possible to suppress the number equivalent to 2 mm diameter lesions to 10 or less, and when 2800 μg/m ² or more is supplied, the number equivalent to 2 mm diameter lesions can be suppressed to 4 or less, and further 7600 μg/m ² or more. is supplied, the number corresponding to 2 mm diameter lesions can be suppressed to 1 or less.

In addition, for cut flowers after harvest and before transportation, even if the high humidity condition continues for 3 days, the vaporized substance of hypochlorous acid water is supplied until the total amount of HClO reaches 3400 μg/m ² or more to sterilize. By this, it is possible to suppress the number equivalent to 2 mm diameter lesions to 10 or less, and when 6700 μg/m ² or more is supplied, the number equivalent to 2 mm diameter lesions can be suppressed to 4 or less, and further 11400 μg/m ² or more. is supplied, the number corresponding to 2 mm diameter lesions can be suppressed to 1 or less.

In addition, for cut flowers after harvest and before transportation, even if the high humidity condition continues for 3 days, the vaporized substance of hypochlorous acid water is supplied until the total amount of HClO reaches 8400 μg / m ² or more to sterilize. By this, it is possible to suppress the number equivalent to 2 mm diameter lesions to 10 or less, and when 10,600 μg/m ² or more is supplied, the number equivalent to 2 mm diameter lesions can be suppressed to 4 or less, and further 15,200 μg/m ² or more. is supplied, the number corresponding to 2 mm diameter lesions can be suppressed to 1 or less.

The term "high humidity" as used herein refers to humidity suitable for the onset of disease, for example, humidity of 80 to 100%.

The number of days in which the number of lesions can be suppressed under conditions of high humidity can be applied to the transportation period of cut flowers. According to the first embodiment, the total HClO arrival amount can be set according to the transportation period of cut flowers.

On the other hand, although there is concern about deterioration in quality such as discoloration and loss of flower fragrance due to excessive supply, it was visually confirmed that there was no chlorine damage up to a total amount of HClO reaching 42000 μg/m ² .

Vaporized hypochlorous acid water can be used at a unit time HClO reaching amount of 5 μg/(m ² ·min) to 700 μg/(m ² ·min).

If the amount of HClO reached per unit time is less than 5 μg/(m ² ·min), there is a tendency that sterilization cannot catch up with the growth of bacteria. On the other hand, at high concentrations, there is concern about chlorine damage due to oversupply, but it has been confirmed visually that there is no problem up to 700 μg/(m ² ·min).

The total HClO arrival amount can be set to 3500 μg/m ² or more and 23000 μg/m ² or less in accordance with the transportation period.

When the total HClO arrival amount of vaporized substances of hypochlorous acid water is less than 3500 μg/m ² , there is a tendency that the risk of multiple lesions occurring when the humidity becomes high during transportation increases, Even if it is supplied in excess of 23000 μg/m ² , the effect of suppressing the number of lesions equivalent to 2 mm in diameter may hardly change.

By maintaining the ambient atmosphere around the cut flowers at a humidity of 80% or higher, the freshness of the cut flowers can be maintained. In addition, after the treatment with the vaporized hypochlorous acid water, the atmosphere around the cut flowers can be maintained at a humidity of 80% or higher.

The hypochlorous acid water vaporized substance used in the embodiment is obtained by vaporizing or spraying hypochlorous acid water, which is an aqueous solution containing hypochlorous acid, into the processing space, and is at least an object. It is in a vaporized state when it reaches the cut flower, and is so small that it does not get wet even if it touches the cut flower, or it exists in the space with a molecular size.

As a method of vaporizing or spraying hypochlorous acid water that can be used in the embodiment, for example, by impregnating a filter with hypochlorous acid water and ventilating air through the filter, hypochlorous acid A method of contacting water and air to convert hypochlorous acid water into a gas and releasing it, a method of impregnating hypochlorous acid water into a cloth including non-woven fabric and allowing it to vaporize naturally without ventilation, or A method of spraying hypochlorous acid water, or a method of vaporizing hypochlorous acid water misted by an ultrasonic oscillator by evaporation due to air temperature before it reaches an object, or the like can be mentioned. The use of a filter has the advantage that even if the electrolyzed water contains chlorides, they are less likely to be vaporized.

The total HClO arrival amount of the vaporized substance of hypochlorous acid water and the HClO arrival amount per unit time can be obtained as follows.

As a method for measuring the amount of HClO sprayed in space reaching an object, there is an APF method as an evaluation method using a fluorescent reagent APF (Aminophenyl Fluorescein) for detecting active oxygen. APF shows almost no fluorescence in a neutral aqueous solution, but when it reacts with hypochlorous acid (HClO/OCl ^- ), it produces a strongly fluorescent compound and emits strong fluorescence around 515 nm with excitation light of 490 nm. It has been confirmed that there is a correlation between this fluorescence intensity and the amount of hypochlorous acid added.

Therefore, an arbitrary container containing an aqueous APF solution is placed for an arbitrary time at a place where cut flowers to be sterilized are placed in the HClO spray space, and HClO reaching the container is collected. Calculate the amount of hypochlorous acid reached from the fluorescence intensity of the recovered liquid, and normalize it by the area of the container and the recovery time, so that the weight of hypochlorous acid that reaches per unit area and unit time, that is, the amount of HClO that reaches per unit time μg/(m ² min) can be obtained, and the total weight of HClO reaching per unit area by multiplying the amount of HClO reached per unit time, that is, the total amount of HClO reached μg/m ² can be done.

According to the embodiment, since the vaporized hypochlorous acid water is used, even water-repellent cut flowers can be sterilized by supplying hypochlorous acid without wetting the surface.

For example, the following sterilization system can be applied to the cut flower sterilization method according to the embodiment.

A cut flower sterilization system applicable to the embodiments includes a vaporizing unit that vaporizes hypochlorous acid, and a supply unit that includes a conveying unit that causes the vaporized hypochlorous acid substance vaporized by the vaporizing unit to reach the periphery of cut flowers, A unit-time HClO arrival amount prediction unit that predicts the unit-time HClO arrival amount of hypochlorous acid that has reached the periphery of cut flowers from the supply unit, and the unit-time HClO arrival amount prediction unit, and the total HClO arrival amount predicted by the unit-time HClO arrival amount prediction unit are the target values. up to and including a control unit for controlling the supply unit.

FIG. 2 shows a diagram schematically showing a configuration example of a cut flower sterilization system applicable to the embodiment.

As shown in the figure, this cut flower sterilization system 1 is connected to a supply unit 20, a control unit 14 that controls the supply unit 20, and the unit time HClO arrival amount of hypochlorous acid that has reached the periphery of the cut flowers and a unit time HClO arrival amount prediction unit 19 that predicts the

The supply unit 20 includes a tank 10, a pipe 11, a pump 12, a housing 15 having an intake port 15a and an exhaust port 15b, and a vaporizing unit 16 for vaporizing hypochlorous acid housed in the housing 15. and a fan 17 for causing vaporized hypochlorous acid to reach the periphery of cut flowers.

The tank 10 stores hypochlorous acid water, which is an example of sterilizing water. The hypochlorous acid water is appropriately replenished manually through a water supply port provided in the tank 10 or by a power source such as a pump through a water supply pipe connected to the tank 10 .

The pipe 11 has one end connected to, for example, the bottom surface of the tank 10 and the other end connected to the vaporizing section 16 . The pump 12 functions as a liquid delivery device for supplying the hypochlorous acid water in the tank 10 to the vaporization section 16 and is provided on the pipe 11 . The pump 12 can adjust the flow rate of the hypochlorous acid water sent to the vaporization unit 16 by, for example, variable control of the rotation speed. The hypochlorous acid water may be transferred from the tank 10 to the vaporization unit 16 by using hydraulic head pressure or the like. In this case, the flow rate of the hypochlorous acid water to be sent to the vaporization unit 16 can be adjusted by, for example, providing the pipe 11 with a solenoid valve whose degree of opening is variable.

In the example of FIG. 2, the pipe 11 extends inside the housing 15 and is connected to the vaporizer 16 .

The vaporization unit 16 vaporizes the hypochlorous acid water supplied through the pipe 11 and releases the sterilizing component into the space. At the same time, the vaporization section 16 also generates mist with a relatively small particle size. As a method for generating such mist and vaporizing it before reaching the object, for example, an ultrasonic method can be adopted. In this case, the vaporization unit 16 vibrates a container for storing the hypochlorous acid water supplied through the pipe 11 and the hypochlorous acid water stored in this container by ultrasonic waves, and the hypochlorous acid water from the liquid surface is and an ultrasonic vibrator that generates a mist of chloric acid water. In addition, as a method of vaporizing the hypochlorous acid water by the vaporization unit 16, there is a method of vaporizing (atomizing) the hypochlorous acid water by discharging the hypochlorous acid water from a nozzle having fine holes. may be adopted. However, since it is preferable to sterilize the object without wetting it, it is desirable that the amount of mist generated is small and the particle size is small.

Alternatively, as the vaporization unit 16, for example, a water absorption filter that absorbs the hypochlorous acid water dropped from the pipe 11 can be used. This water absorption filter may have a fine structure such as a fine honeycomb structure in order to increase the contact area with air and efficiently vaporize the hypochlorous acid water. Furthermore, the water absorption filter is made of a material that does not easily react with hypochlorous acid water, such as a polyolefin material such as polyethylene or polypropylene, or an inorganic material, or the surface is coated with these materials. It can be. By using such a water absorption filter, corrosion of the water absorption filter due to hypochlorous acid water and deactivation of hypochlorous acid water can be prevented. The vaporizing unit 16 can also generate mist with a relatively small particle size at the same time as vaporizing the hypochlorous acid water.

The evaporating unit is not limited to equivalents of the above-described methods, and may be of any other type as long as it has a evaporating function such as a thermal evaporating method or the like.

The fan 17 sends out the hypochlorous acid water vapor and mist generated by the vaporizer 16 to the outside of the housing 15 . Specifically, as the fan 17 rotates, air is taken into the housing 15 from the intake port 15a, and this air is sent from the exhaust port 15b together with the hypochlorous acid water vapor and mist generated by the vaporization unit 16. It is discharged (sprayed). By variable control of the rotational speed of the fan 17, the amount of vaporized hypochlorous acid water and the like sprayed to the outside of the housing 15 and the air volume can be adjusted.

The control unit 14 includes, for example, a processor that plays a central role in controlling the first sterilization device 1, a memory that stores various setting conditions and a computer program executed by the processor, and a power supply that generates voltage to be supplied to each part. ing. This control unit 14 controls the pump 12, vaporization unit 16, fan 17, and the like. The control unit 14 is connected to a unit time HClO arrival amount prediction unit 19 that predicts the unit time HClO arrival amount of hypochlorous acid that has reached the periphery of the cut flowers from the supply unit.

The control unit 14 can control the operation of the supply unit 20 until the total HClO arrival amount calculated by the unit time HClO arrival amount prediction unit 19 reaches a target value.

For example, the controller 14 can control the number of rotations of the fan 17 to such an extent that the surface of the cut flowers is not wetted.

With such vaporized hypochlorous acid water, it is possible to sterilize the surface of cut flowers without wetting them. Do not over-wet. Therefore, for cut flowers that are unsuitable for immersion in water, and for petals that cannot be sterilized with general water-based chemicals due to their water repellency, hypochlorous acid water is vaporized. is suitable for sterilization because the hypochlorous acid component can reach the inside of the petals. The particle size of the mist (liquid mist) that does not wet the surface of cut flowers is, for example, about 50 μm or less.

FIG. 3 shows a schematic diagram representing an example of a cut flower management system equipped with a sterilization system applicable to the embodiment.

As shown in the figure, this cut flower management system 30 includes a storage unit 2 that stores cut flowers, a sterilization system 40 that supplies hypochlorous acid vapor to the cut flowers stored in the storage unit 2, and and a dehumidifying section 3 that manages the humidity of the

In the sterilization system 40, the unit-time HClO arrival amount prediction unit 19 further includes a storage unit 23 in which the relationship between the unit-time HClO arrival amount and the operation time of the supply unit 20 is stored in advance. predicting the scheduled time until the total arrival amount of hypochlorous acid HClO reaches the target value based on the information from the storage unit 23, and operating the supply unit 20 until the scheduled time is reached by the control unit 14; 2 except that the controller 14 is connected to the dehumidifier 3. FIG.

FIG. 4 shows a flow chart representing a cut flower processing method in the cut flower management system of FIG.

As illustrated, in this method, first, the operation of the supply unit 20 is started, and the hypochlorous acid water supplied from the tank 10 is vaporized in the vaporization unit 16 to generate the hypochlorous acid water vaporized substance. (BL1).

Vaporized hypochlorous acid water is conveyed to the outside of the housing 15 by using the fan 17 and reaches the cut flowers stored in the storage unit 2 (BL2).

Based on the information from the storage unit 23, the unit time HClO arrival amount prediction unit 19 predicts the expected time until the total HClO arrival amount of hypochlorous acid reaches the target value (BL3).

Subsequently, it is determined whether or not the scheduled time has passed (BL4).

When the scheduled time has passed, the control unit 14 stops the operation of the supply unit 20 .

If the scheduled time has not elapsed, the operation of the supply unit 20 is continued.

The humidity in the management system 30 can be adjusted by operating the dehumidifier as required by the controller 14 .

FIG. 5 shows a schematic diagram representing another example of a cut flower management system equipped with a sterilization system applicable to the embodiment.

In this sterilization system 50, instead of the unit time HClO arrival amount prediction unit 19 including the storage unit 23, the unit time HClO arrival amount prediction unit 19 is connected to the hypochlorous acid total HClO arrival amount around the cut flowers. The configuration is the same as that of FIG. 3 except that a measurement unit 25 for measuring is further included.

The active oxygen detection fluorescent reagent APF can also be used in the measurement section.

The unit time HClO arrival amount prediction unit 19 may further include a storage unit 23 .

FIG. 6 shows a flow diagram representing a cut flower processing method in the cut flower management system of FIG.

As shown in the figure, in this method, first, the operation of the supply unit 20 is started, and in the same manner as in FIG. The vaporized substance is conveyed to reach the cut flowers stored in the storage unit 2 (BL2).

Subsequently, the amount of hypochlorous acid reaching the peripheries of the cut flowers per unit time HClO is measured by the measurement unit 25 (BL5).

After that, it is determined whether or not the total amount of HClO reached is the target value (BL6).

When the target value is reached, the control unit 14 stops the operation of the supply unit 20 .

If the target value is not reached, the control unit 14 continues the operation of the supply unit 20 .

When the target value is a total HClO arrival amount of 260 μg/m ² to 42000 μg/m ² and the unit time HClO arrival amount is 700 μg/(m ² ·min), the operation time of the supply section should be 22 seconds to 60 minutes. can be done.

When the target value is 260 μg/m ² to 42,000 μg/m ² of total HClO arrival amount, and the unit time HClO arrival amount is 5 μg/(m ² min), the operation time of the supply section should be 52 minutes to 140 hours. can be done.

Acidic electrolyzed water that can be used as hypochlorous acid water in the embodiments can be generated using the following device.

FIG. 7 shows a diagram illustrating an example of an electrolyzed water generator capable of generating electrolyzed water used in the embodiment.

As illustrated, the electrolyzed water generator includes a so-called three-chamber type electrolytic bath (electrolytic cell) 100 . The electrolytic cell 100 is formed in a flat rectangular box shape, and the inside thereof is divided into an intermediate chamber 115a and an intermediate chamber 115a by an anion exchange membrane (first diaphragm) 112 and a cation exchange membrane (second diaphragm) 114. It is partitioned into three chambers, an anode chamber 115b and a cathode chamber 115c located on both sides. An anode 116 is provided in the anode chamber 115 b and faces the anion exchange membrane 112 . A cathode 118 is provided in the cathode chamber 115 c and faces the cation exchange membrane 114 . The anode 116 and the cathode 118 are formed in rectangular plate shapes of approximately the same size, and are opposed to each other with the intermediate chamber 15a interposed therebetween.

The electrolyzed water generator includes an electrolytic solution supply unit 119 that supplies an electrolytic solution, such as saturated salt water, to the intermediate chamber 115a of the electrolytic cell 100, and an electrolytic raw water, such as water, that is supplied to the anode chamber 115b and the cathode chamber 115c. and a power supply 213 for applying positive and negative voltages to the anode 116 and the cathode 118, respectively.

The electrolyte supply unit 119 includes a salt water tank 215 that generates saturated salt water, a supply pipe 119a that guides the saturated salt water from the salt water tank 215 to the lower part of the intermediate chamber 115a, a liquid feed pump 219 provided in the supply pipe 119a, and a drain pipe 119b for sending the electrolytic solution that has flowed through the intermediate chamber 115a to the salt water tank 215 from the upper portion of the intermediate chamber 115a.

The water supply unit 211 includes a water supply source (not shown) that supplies water, a water supply pipe 211a that guides water from the water supply source to the lower portions of the anode chamber 115b and the cathode chamber 115c, and the water that flows through the anode chamber 115b to the upper portion of the anode chamber 115b. and a second drainage pipe 211c for discharging the water flowing through the cathode chamber 115c from the upper portion of the cathode chamber 115c.

When acid water (hypochlorous acid water and hydrochloric acid) and alkaline water (sodium hydroxide) are generated by the electrolyzed water generator configured as described above, the liquid feed pump 219 is operated to Saturated salt water is supplied to chamber 115a, and water is supplied to anode chamber 115b and cathode chamber 115c. At the same time, positive and negative voltages are applied from power supply 213 to anode 116 and cathode 118, respectively. The sodium ions ionized in the salt water flowing into the intermediate chamber 115a are attracted to the cathode 118, pass through the cation exchange membrane 114, and flow into the cathode chamber 115c. In the cathode chamber 115c, the cathode 118 electrolyzes water to produce hydrogen gas and an aqueous sodium hydroxide solution. The generated aqueous sodium hydroxide solution and hydrogen gas flow out from the cathode chamber 115c to the first drain pipe 211b and are separated into an aqueous sodium hydroxide solution and hydrogen gas by a gas-liquid separator (not shown). The separated aqueous sodium hydroxide solution (alkaline water) is discharged through the first drain pipe 211b.

Chlorine ions ionized in the salt water in the intermediate chamber 115a are attracted to the anode 116, pass through the anion exchange membrane 112, and flow into the anode chamber 115b. Then, chlorine ions are reduced at the anode 116 to generate chlorine gas. After that, the chlorine gas reacts with water in the anode chamber 115b to produce hypochlorous acid water and hydrochloric acid. The acidic water (hypochlorous acid water and hydrochloric acid) thus generated flows out from the anode chamber 115b through the second drain pipe 211c.

This electrolyzed water generator is of a three-chamber type, but other types such as a two-chamber type electrolyzed water generator can be used. In the case of the three-chamber type, the acidic electrolyzed water contains almost no chlorides, but in the case of the two-chamber type, chlorides are mixed in. In this case, when the filter is impregnated with the acidic electrolyzed water and vaporized, there is an advantage that the chloride contained in the electrolyzed water is not vaporized.

In the cut flower sterilization method according to the second embodiment, the vaporized substance of hypochlorous acid water is supplied to the cut flowers, and the amount of HClO reaching the ambient atmosphere of the cut flowers per unit time is reduced to 5 to 60 μg / (m ² min) on average. maintain.

In this method, since sterilization is performed in an ambient atmosphere in which the amount of HClO reached per unit time is relatively low, in the distribution from production to sale of cut flowers shown in FIG. The resulting cut flowers are landed (BL13), adjusted for bouquets (BL14), and packed (BL15), then stored at low temperature until shipment, transported (BL16), marketed (BL17), intermediate wholesaler (BL18). through to the retail store (BL19). Therefore, for example, even if the cold chain breaks during distribution, the risk of disease damage to cut flowers can be reduced.

If the amount of HClO reaching the ambient atmosphere of cut flowers per unit time is less than 5 μg/(m ² ·min) on average, sterilization tends to fail to catch up with the growth of fungi. In addition, there is a high possibility that cut flowers will be exposed to the outside air in the distribution process from shipping (BL16), market (BL17), intermediate wholesaler (BL18), to retail stores (BL19), and the surrounding atmosphere of cut flowers In some cases, it may be difficult to sufficiently maintain the amount of HClO reached per unit time in an ambient atmosphere exceeding 60 μg/(m ² ·min) on average.

When the amount of HClO reached per unit time in the surrounding atmosphere of cut flowers is relatively large, for example, when the amount of HClO reached per unit time is 15 to 60 μg/(m ² min) on average, the total amount of HClO reached (Amount of HClO reached per unit time × If the treatment time) is maintained to 7000 μg/m ² or more within 24 hours, even if the high humidity condition continues for 1 day, the number of gray mold lesions equivalent to 2 mm in diameter can be suppressed to 10 or less, If the concentration is maintained at 10,000 μg/m ² or more, the number corresponding to 2 mm diameter lesions can be suppressed to 4 or less, and if the concentration is maintained at 16,000 μg/m ² or more, the number corresponding to 2 mm diameter lesions can be suppressed to 1 or less. can. In addition, if it is maintained to 20000 μg/m ² or more within 24 hours, even if the high humidity condition continues for 2 days, the number of gray mold lesions equivalent to 2 mm in diameter can be suppressed to 10 or less, and 22500 μg/m If maintained until m ² or more, the number of lesions equivalent to 2 mm in diameter can be suppressed to 4 or less. In addition, by maintaining this ambient atmosphere until the total HClO arrival amount reaches 23000 μg/m ² or more, even if the high humidity condition continues for 3 days, the number of lesions equivalent to 2 mm in diameter can be suppressed to 10 or less. is possible.

In addition, when the amount of HClO reached per unit time in the surrounding atmosphere of cut flowers is relatively small, for example, when the amount of HClO reached per unit time is 5 to 15 μg/(m ² min) on average, the total amount of HClO reached (HClO reached per unit time Amount x treatment time) reaches 7000 μg/m ² or more within 24 hours. The atmosphere can be maintained at an average HClO arrival rate of 5-15 μg/(m ² ·min) per hour. In addition, after maintaining the total amount of HClO reached to 16000 μg/m ² or more, the vaporized hypochlorous acid water can be resupplied within 48 hours to maintain the same amount of HClO reached per unit time. In addition, after maintaining until the total HClO arrival amount reaches 20000 μg/m ² or more, it is possible to resupply the vaporized hypochlorous acid water within 48 hours to maintain the same HClO arrival amount per unit time. be.

When resupplying the vaporized hypochlorous acid water within 48 hours, the average amount of HClO reached per unit time is 15 to 60 μg/(m ² ·min) in the ambient atmosphere.

It is also possible to maintain the amount of HClO reached per unit time for 48 hours or more in the ambient atmosphere at an average of 5 to 15 μg/(m ² ·min).

According to the second embodiment, even if the amount of HClO reached per unit time is smaller, the total amount of HClO reached within 48 hours (amount of HClO reached per unit time × treatment time) averaged 5 to 60 μg / (m ²・Min) is sufficient to sterilize cut flowers.

In addition, the vaporized substance of hypochlorous acid water is supplied to the cut flowers, and the unit time HClO arrival amount of the atmosphere around the cut flowers is maintained at an average of 5 to 60 μg/(m ² min), and the atmosphere around the cut flowers is further improved. Humidity can be maintained above 80%. As a result, cut flowers can be sterilized and freshness can be maintained.

In addition, after the step of maintaining the average amount of HClO reaching 5 to 60 μg/(m ² ·min) per unit time in the surrounding atmosphere of the cut flowers, the cut flowers can be stored at a humidity of 80% or more. Thereby, the freshness of cut flowers can be maintained.

In the cut flower sterilization method according to the second embodiment, a sterilization unit for supplying vaporized hypochlorous acid water can be used.

FIG. 23 shows a schematic diagram showing an example of a sterilization unit applicable to the cut flower sterilization method according to the second embodiment.

As shown, the sterilization unit 60 has a main body 65 having an upper opening, a filter paper 64, a support 62 supporting the filter paper 64, and a cap 63 provided on the support 62. A support 62 with a filter paper 64 attached thereto is inserted into an opening of a main body 65 containing chloric acid water 65 . By using this sterilization unit 60 , the hypochlorous acid water 65 can be naturally vaporized through the filter paper 64 .

Such a sterilization unit can be arranged in a space containing cut flowers to supply vaporized hypochlorous acid water. The unit time HClO arrival amount of the vaporized substance of hypochlorous acid water can be adjusted by moving the filter paper 64 up and down using the cap 63 .

FIG. 24 shows a schematic diagram of another example of a sterilization unit applicable to the cut flower sterilization method according to the second embodiment.

As illustrated, the sterilization unit 70 includes a flower vat body 71, an inner container 73 and an outer container 74 provided in the flower vat body 71 and separated by a partition wall 72, an inner container 73 and an outer Water absorbing sponges 75 and 76 are respectively accommodated in a container 74, water is applied to the inner water absorbing sponge 75, and hypochlorous acid water is applied to the outer water absorbing sponge 76. - 特許庁The partition wall 72 is attached to the outer container 74 at a certain distance by a support member (not shown). When this sterilization unit 70 is used and cut flowers are accommodated in the inner container 73, the vaporized hypochlorous acid water naturally vaporized from the outer container 74 can be supplied to the cut flowers.

The sterilization unit shown in FIGS. 23 and 24 can be installed, for example, in containers used in the process of transporting cut flowers, showcases of retail stores, and the like. These sterilization units utilize natural vaporization of hypochlorous acid water, but a sterilization system that vaporizes hypochlorous acid water using a fan as shown in FIG. 2 may be used.

EXAMPLES Hereinafter, embodiments will be specifically described by showing Examples.

Example 1
Relationship between the spontaneous onset of gray mold on roses and the amount of hypochlorous acid supplied ^. A dehumidifier for humidity adjustment, an electrolyzed water evaporation generator, and a container vessel were placed in a test booth covered with .

Acidic electrolyzed water having a pH of 6.15 and a free available chlorine (FAC) concentration of 40 mg/kg was prepared as hypochlorous acid water, and aged for 10 minutes by introducing it into a supply tank and spraying it.

Next, cut flowers of roses (cultivar Avalanche) were obtained from rose producers immediately after landing, placed in test tube stands at regular intervals, placed in containers, and treated with hypochlorous acid water for each treatment time. Sterilization was performed by setting 0, 15, 30, 60 minutes. The temperature in the test booth during the spraying treatment was adjusted to 15° C.-25° C. and the relative humidity was adjusted to 60-70%.

As a method of spraying hypochlorous acid water, a filter is impregnated with hypochlorous acid water, and air is passed through the filter to bring the hypochlorous acid water and air into contact with each other. A method of converting to gas and releasing was used.

A 9 cm Petri dish containing 20 ml of APF solution was placed in the test booth, and the amount of HClO absorbed by the APF solution was measured by the APF method ^. there were.

After the spray treatment, the container in which the cut roses were placed was covered with filter paper, filled with water, sealed, and the inside of the container was made to have a high humidity of 100%. These containers were stored in a booth at a temperature of 15° C. to 25° C. After 1, 2, 3, and 4 days, four containers were examined for disease caused by botrytis.

Disease incidence was determined by the gray mold metric.

The results obtained are shown in Table 1 below.

FIG. 8 shows a graph representing the relationship between the number of days elapsed and the number of lesions equivalent to 2 mm in diameter created based on Table 1. In FIG.

In FIG. 8, graphs 101, 102, 103, and 104 represent the results of no treatment, 15-minute treatment, 30-minute treatment, and 60-minute treatment, respectively.

From Table 1 and FIG. 8, it can be confirmed that, when the amount of HClO reached per unit time was 129 μg/(m ² ·min) on average, the greater the total amount of HClO reached, the more the effect of suppressing the disease. For example, when stored in a high-humidity space for 2 days after sterilization, the number of lesions equivalent to 2 mm in diameter is 25.0 for 15 minutes of treatment (total amount of HClO reached: 1935 μg/m ² ), and 25.0 for 30 minutes of treatment (total amount of HClO reached: 3870 μg/m ² ) can be suppressed to 4.75 particles, and 60 minutes treatment (HClO total arrival amount 7740 μg/m ² ) can be suppressed to 1.5 particles.

Example 2
The air volume of the supply part or the concentration of hypochlorous acid water, the vaporization area, etc. were adjusted, and the average amount of HClO reached per unit time was 250 μg / (m ² min). In cut flowers, the onset of disease caused by botrytis fungus was investigated.

The results obtained are shown in Table 2 below.

FIG. 9 shows a graph representing the relationship between the number of elapsed days and the number of lesions equivalent to 2 mm in diameter created based on Table 2. In FIG.

In FIG. 9, graphs 201, 202, 203, and 204 represent the results of no treatment, 15-minute treatment, 30-minute treatment, and 60-minute treatment, respectively. From Table 2 and FIG. 9, when the average HClO arrival amount per unit time was 250 μg / (m ² · min) and stored in a high humidity space for 2 days after sterilization, the number of lesions equivalent to 2 mm in diameter was treated for 15 minutes (HClO total Suppressed to 22.25 cells at a reaching amount of 3750 μg/m ² ), 6.5 cells after a 30-minute treatment (total HClO reaching amount of 7500 μg/m ² ), and 0 cells after a 60-minute treatment (total HClO reaching amount of 15000 μg/m ² ). I know you can.

Example 3
Same as Example 2, except that cut flowers of roses (cultivar Avalanche) obtained from rose producers immediately after landing are used, and the hypochlorous acid water spraying time is set to 0, 1, 2, and 3 hours. and sterilized.

The total HClO arrival amount in the test booth was investigated using the APF method, and the unit time HClO arrival amount was found to be 235 μg/(m ² ·min) on average. In the same manner as in Example 1, the inside of the test booth during the spraying treatment was adjusted to a temperature of 15° C. to 25° C. and a relative humidity of 60 to 70%.

After 1, 2, 3, and 4 days, the sterilized cut rose flowers were examined for disease by botrytis on four of them.

The results obtained with the sterilization treatment are shown in Table 3 below.

FIG. 10 shows a graphical representation of the relationship between the number of elapsed days and the number of lesions equivalent to 2 mm in diameter created based on Table 3. In FIG.

In FIG. 10, graphs 301, 302, 303, and 304 represent the results of no treatment, 1-hour treatment, 2-hour treatment, and 3-hour treatment, respectively.

From Table 3 and FIG. 10, when the average HClO arrival amount per unit time was 235 μg / (m ² · min) and stored in a high humidity space for 4 days after sterilization, the number of lesions equivalent to 2 mm in diameter was treated for 1 hour (total HClO It can be seen that the amount reached is 14100 μg/m ² ) and can be suppressed to 0.5.

Example 4
The air volume of the supply part or the concentration of hypochlorous acid water, the vaporization area, etc. were adjusted, and the average amount of HClO reached per unit time was 161 μg / (m ² min). In cut flowers, the onset of disease caused by botrytis fungus was investigated.
The results obtained with the sterilization treatment are shown in Table 4 below.

FIG. 11 shows a graph representing the relationship between the number of elapsed days and the number of lesions equivalent to 2 mm in diameter created based on Table 4. In FIG.

In FIG. 11, graphs 401, 402, 403, and 404 represent the results of no treatment, 15-minute treatment, 30-minute treatment, and 60-minute treatment, respectively.

From Table 4 and FIG. 11, when the average HClO arrival amount per unit time was 161 μg / (m ² · min) and stored in a high humidity space for 4 days after sterilization, the number of lesions equivalent to 2 mm in diameter was treated for 1 hour (total HClO Suppressed to 7.5 cells with reaching amount of 9660 μg/m ² ), 6.25 cells after 2 hours treatment (total amount of HClO reaching 19320 μg/m ² ), and 0 cells after 3 hours treatment (total amount of HClO reaching 28980 μg/m ² ). I know you can.

A comparison of Examples 1 to 4 reveals that although the total amount of HClO reached is about the same, there is variation in the suppression of lesions. For example, the 30-minute treatment of Example 1 (total HClO arrival amount 3870 μg/m ² ) and the 15-minute treatment of Example 2 (total HClO arrival amount 3750 μg/m ² ) were applied to lesions after storage for 2 days in a high-humidity space. The numbers are 4.75 and 22.25, respectively, with different suppressing effects.

For example, lesions after storage for 4 days in a high-humidity space by 60-minute treatment in Example 2 (total HClO arrival amount 15000 μg/m ² ) and 1-hour treatment in Example 3 (total HClO arrival amount 14100 μg/m ² ) The numbers are 16.0 and 0.5, respectively, with different suppressing effects.

This is caused by the fact that the number of adhering fungi differs at the time of harvesting the roses, and that the degree of growth of the adhering fungi differs.

Therefore, in order to define the total amount of HClO that is necessary for controlling the disease of cut flowers, the relationship between the total amount of HClO that reaches and the equivalent number of lesions with a diameter of 2 mm was examined for the results of Examples 1 to 4. Plotting the number y corresponding to 2 mm diameter lesions against the total amount of HClO reached x, the sigmoid curve formula y = d + (ad) / (1 + (x / c) b ) (1 + (x / c) ^b ) represented by the following formula (1) )
was approximated by

FIG. 12 shows data representing the relationship between the total amount of HClO reached on the first day and the equivalent number of lesions with a diameter of 2 mm.

Here, the range of the number of lesions y in the non-treated plot as a control is 1<y<9.

Also, at this time, a=4.27468, b=1.47667, c=1617.5583, d=-0.064598, and correlation coefficient R ₂ =0.59513 in equation (1).

When the number corresponding to 2 mm diameter lesions estimated from the approximate expression is 4, the total amount of HClO reached is 3462 μg/m ² , 1 when 261 μg/m ² , and 0 when 27658 μg/m ² .

From FIG. 12, it can be seen that if the total amount of HClO reached is 3462 μg/m ² or more, the number corresponding to 2 mm diameter lesions can be suppressed to 4 or less for one day. To make the number equivalent to 2 mm diameter lesions 0, it is 27658 μg / m ² , which is higher than the value on the second day described later, but the measured values tend to vary at the beginning of the appearance of lesions, making it unreliable. expected to be lower.

FIG. 13 shows data representing the relationship between the total amount of HClO reached on the second day and the number of lesions equivalent to 2 mm in diameter.

Here, the range of the number of lesions y in the control untreated plot is 28<y<82.

Also, at this time, in formula (1), a=63.45682, b=1.47815, c=1572.50324, d=-1.42221, and correlation coefficient R ₂ =0.84819.

When the equivalent number of 2 mm diameter lesions estimated from the approximate expression is 10, the total amount of HClO reached is 4467 μg/m ² , 7947 μg/m ² at 4, 14171 μg/m ² at 1, and 20536 μg/m ² at 0. be.

From FIG. 13, it can be seen that if the total amount of HClO reached is 4467 μg/m ² or more, the number corresponding to lesions with a diameter of 2 mm can be suppressed to 10 or less for 2 days. It can be seen that a smaller amount than the first day is sufficient to suppress the number of lesions corresponding to 2 mm in diameter to 4 or 1. The approximation formula yielded a higher correlation than on the first day.

FIG. 14 shows data representing the relationship between the total amount of HClO reached on day 3 and the number of lesions equivalent to 2 mm in diameter.

Here, the range of the number of lesions y in the control untreated plot is 50<y<115.

At this time, a=94.28938, b=1.45731, c=2186.3421, d=-2.41162, and correlation coefficient R ₂ =0.86647 in formula (1).

When the equivalent number of 2 mm diameter lesions estimated from the approximate expression is 10, the total amount of HClO reached is 8139 μg/m ² , 13425 μg/m ² at 4, 21169 μg/m ² at 1, and 27055 μg/m ² at 0. be.

From FIG. 14, it can be seen that when the total amount of HClO reached is 8139 μg/m ² or more, the number corresponding to lesions with a diameter of 2 mm can be suppressed to 10 or less for 3 days. It can be seen that a smaller amount than the second day is sufficient to suppress the number of lesions corresponding to 2 mm in diameter to 4 or 1. In addition, untreated cut flowers with a high risk of occurrence exceeding 115 lesions with a diameter of 2 mm are out of the range of the approximation formula.

FIG. 15 shows data representing the relationship between the total amount of HClO reached on day 4 and the equivalent number of lesions with a diameter of 2 mm.

Here, the range of the number of lesions y in the control untreated plot is 93<y<313.

Also, at this time, in formula (1), a=245.01217, b=1.39273, c=2082.32045, d=-7.66145, and the correlation coefficient R ₂ =0.81374.

When the equivalent number of 2 mm diameter lesions estimated from the approximate expression is 10, the total amount of HClO reached is 13355 μg/m ² , 18321 μg/m ² at 4, 22884 μg/m ² at 1, and 25065 μg/m ² at 0. be.

From FIG. 15, it can be seen that when the total amount of HClO reached is 13355 μg/m ² or more, the number corresponding to 2 mm diameter lesions can be suppressed to 10 or less for 4 days. It can be seen that a smaller amount than the third day is sufficient to suppress the number of lesions corresponding to 2 mm in diameter to 4 or 1. In addition, untreated cut flowers with a high risk of occurrence exceeding 313 lesions with a diameter of 2 mm are out of the range of the approximation formula.

Table 5 below summarizes the elapsed days, the number of lesions equivalent to 2 mm in diameter, and the total amount of HClO that was estimated from the approximation formula.

Therefore, when the HClO arrival amount per unit time is 5 to 350 μg / (m ² min), the total HClO arrival amount for suppressing the number equivalent to 2 mm diameter lesions to 10 or less is within 1 day in high humidity conditions. It is defined as 260 μg/m ² or more if it occurs within 2 days, 4500 μg/m ² or more if it occurs within 2 days, 8500 μg/m ^{2 or} more if it occurs within 3 days, and 14000 μg/m ^{2 or} more if it occurs within 4 days.

When the unit time HClO arrival amount is 5 to 350 μg / (m ² min), the total HClO arrival amount to suppress the number equivalent to 2 mm diameter lesions to 4 or less is It is defined as 260 μg/m ² or more, 8,000 μg/m ² or more within 2 days, 14,000 μg/m ² or more within 3 days, and 19,000 μg/m ² or more within 4 days.

When the unit time HClO arrival amount is 5 to 350 μg / (m ² min), the total HClO arrival amount to suppress the number equivalent to 2 mm diameter lesions to 1 or less is It is defined as 3,500 μg/m ² or more, 15,000 μg/m ² or more within 2 days, 22,000 μg/m ² or more within 3 days, and 23,000 μg/m ^{2 or} more within 4 days.

Example 5
Using acidic electrolyzed water with pH 6.12 and free available chlorine (FAC) concentration of 80 mg/kg as hypochlorous acid water instead of acidic electrolyzed water with pH 6.15 and free available chlorine (FAC) concentration of 40 mg/kg. , the average amount of HClO reached per unit time was 679 μg / (m ² · min), and the investigation was conducted after 1, 2, 3, 4, 5, and 6 days had elapsed. In the same manner as in Example 1, except for using the cut rose flowers obtained on the day of , the onset of botrytis was investigated.

The results obtained are shown in Table 6 below.

FIG. 16 shows a graph showing the relationship between the number of elapsed days and the number of lesions equivalent to 2 mm in diameter created based on Table 6. In FIG.

In FIG. 16, graphs 501, 502, 503, and 504 represent the results of no treatment, 15-minute treatment, 30-minute treatment, and 60-minute treatment, respectively.

In the figure, graphs other than graph 501 are almost overlapped and difficult to distinguish.

From Table 6 and FIG. 16, at the average HClO arrival amount per unit time of 679 μg / (m ² min), 15 minutes treatment (total HClO arrival amount 10185 μg / m ² ), which is the minimum time, was stored in a high humidity space after sterilization treatment. In this case, the number corresponding to lesions with a diameter of 2 mm can be suppressed to 0 until the third day, and can be suppressed to 0.25 when stored for 4 days.

Example 6
In the same manner as in Example 5, except that rose cut flowers obtained on a different day from Example 5 are used, and the average amount of HClO reached per unit time is 505 μg / (m ² min). Each disease was investigated.

The results obtained are shown in Table 7 below.

FIG. 17 shows a graph representing the relationship between the number of days elapsed and the number of lesions equivalent to 2 mm in diameter created based on Table 7. In FIG.

In FIG. 17, graphs 601, 602, 603, and 604 represent the results of no treatment, 15-minute treatment, 30-minute treatment, and 60-minute treatment, respectively.

In the figure, graphs other than graphs 601 and 602 are almost overlapped and difficult to distinguish.

From Table 7 and FIG. 17, when the average amount of HClO reached per unit time was 505 μg / (m ² min) and stored in a high humidity space after sterilization, the number of lesions equivalent to 2 mm in diameter was treated for 15 minutes (total amount of HClO reached 7575 μg/m ² ) after storage for 2 days, the number is 0.25 ^, which is 1 or less.

Example 7
Using cut roses obtained on a different day than in Example 5, reaching an average of 379 μg/(m ² min) of HCIO per unit time, and performing the investigation on 1, 2, 3, and 4 Disease onset due to gray mold was investigated in the same manner as in Example 5, except that it was carried out after the lapse of days.

The results obtained are shown in Table 8 below.

FIG. 18 shows a graph representing the relationship between the number of days elapsed and the number of lesions equivalent to 2 mm in diameter created based on Table 8.

In FIG. 18, graphs 701, 702, 703, and 704 represent the results of no treatment, 15-minute treatment, 30-minute treatment, and 60-minute treatment, respectively.

In the figure, graphs other than graphs 701 and 702 are almost overlapped and difficult to distinguish.

From Table 8 and FIG. 18, when the average amount of HClO reached per unit time was 379 μg / (m ² min) and stored in a high humidity space after sterilization, the number equivalent to 2 mm diameter lesions was treated for 30 minutes (total amount of HClO reached 11,370 g/m ² ) after storage for 3 days, it can be seen that the number can be suppressed to 0.25 and 1 or less.

Further, from the results of Examples 5, 6 and 7, when the amount of HClO reached per unit time is greater than 350 μg/(m ² min), the total amount of HClO reached for suppressing the number of lesions equivalent to 2 mm in diameter to 1 or less is It can be seen that it is 7600 μg/m ² or more when the transportation period is 2 days or less, 11400 μg/m ² or more when the transportation period is 3 days or less, and 15200 μg/m ² or more when it is 4 days or less.

Comparing the results of Examples 5, 6, and 7 with the results of Examples 1 to 4, when the amount of HClO reached per unit time is greater than 350 μg/(m ² min), the number corresponding to 2 mm diameter lesions is 1 or less. It can be seen that the total amount of HClO to be reached is about half the amount of HClO to be reached per unit time of 5 to 350 μg/(m ² ·min) if the transportation period is within 3 days.

On the other hand, since Examples 5, 6, and 7 have high concentrations, the minimum total amount of HClO reached is 5685 μg/m ² , so the number corresponding to 2 mm diameter lesions is suppressed to 4 or less, or 10 or less. The total amount of HClO that was required for this was obtained from a sigmoidal curve equation based on experimental values.

In determining the sigmoid curve formulas of Examples 5, 6, and 7, the vertical axis y was taken as the rate of occurrence.
This is because the number of untreated lesions in Examples 5, 6, and 7 is smaller than in Examples 1 to 4, and is correlated with the low concentrations (Examples 1 to 4) so far.

The reason why the number of untreated lesions is small is that this verification was conducted using fungi that naturally occur in cut flowers, so there is variation due to seasonal fluctuations and individual differences.

The incidence ratio is the number of lesions after treatment divided by the average number of lesions without treatment, normalized so as not to be affected by the difference in the number of lesions without treatment. The meaning of is the rate at which the occurrence of lesions can be suppressed. Here, the results of deriving a sigmoid curve formula using the occurrence rate for each number of storage days are shown below.

FIG. 19 shows data representing the relationship between the total amount of HClO reaching the first day and the rate of occurrence of lesions.

Here, the number of lesions equivalent to 2 mm in diameter in the control untreated area was greater than 0 and less than 9, and the average number of lesions in the untreated area was 3.7.

At this time, a=1.00000, b=264.32430, c=6533.86133, d=0.00000, and correlation coefficient R ₂ =1.00000 in equation (1).

FIG. 20 shows data representing the relationship between the total amount of HClO reaching the second day and the rate of occurrence of lesions.

Here, the number of lesions equivalent to 2 mm in diameter in the control untreated area was more than 9 and less than 83, and the average number of lesions in the untreated area was 45.

At this time, a=1.00000, b=1.87196, c=810.61309, d=-0.00071607, and correlation coefficient R ₂ =0.99979 in equation (1).

FIG. 21 shows data representing the relationship between the total amount of HClO reaching the third day and the rate of occurrence of lesions.

Here, the number corresponding to lesions of 2 mm in diameter in the control untreated area was greater than 35 and less than 159, and the average number of lesions in the untreated area was 86.

Also, at this time, a=1, b=1.28774, c=751.81239, d=−0.010432, and correlation coefficient R ₂ =0.99823 in formula (1).

FIG. 22 shows data representing the relationship between the total amount of HClO reached on day 4 and the incidence of lesions.

Here, the number of lesions equivalent to 2 mm in diameter in the control untreated area was more than 93 and less than 342, and the average number of lesions in the untreated area was 226.

Moreover, at this time, a=0.99998, b=4.17779, c=4033.08727, d=0.00018378, and correlation coefficient R ₂ =0.99965 in formula (1).

Next, from the sigmoid curve formula, the total HClO arrival amount required to suppress the number of lesions corresponding to 2 mm in diameter to 10, 4, and 1 or less is calculated. As a procedure, 10, 4, and 1 lesions corresponding to 2 mm diameter lesions are divided by the average number of lesions in the untreated state, and the occurrence rate y of each lesion is calculated. Furthermore, by substituting y into the sigmoid curve formula, it is possible to derive the total HClO arrival amount x required to suppress the number of lesions equivalent to 2 mm in diameter to 10, 4, or 1 or less.

Taking an example of storage for 4 days, the average number of lesions without treatment is 226, so the occurrence rate y is 0.044 for 10, 0.018 for 4, and 0.004 for 1. Substituting this y into the sigmoid curve formula, the total amount of HClO required to reduce the number of lesions equivalent to 2 mm in diameter to 10 or less after storage for 4 days was 8423 μg/m ² , and the total amount of HClO required to reduce the number to 4 or less. The amount is 10574 μg/m ² , and the total amount of HClO required to reduce the number to 1 or less can be derived as 14896 μg/m ² .

Similarly, the total amount of HClO reached was 3397 μg/m ² to reduce the number of lesions equivalent to 2 mm in diameter to 10 or less after storage for 3 days, and the total amount of HClO to reach 6707 μg/m ² was necessary to reduce the number to 4 or less. , the total amount of HClO required to reduce the number to 1 or less can be derived as 14403 μg/m ² .

The total HClO amount required to reduce the number of lesions equivalent to 2 mm in diameter to 10 or less after 2-day storage is 1580 μg/m ² , and the total HClO amount required to reduce the number to 4 or less is 2798 μg/m ² , which is 1 or less. It can be derived that the total amount of HClO reached is 6017 μg/m ² .

The total HClO amount required to reduce the number of lesions corresponding to 2 mm diameter lesions to 1 or less in 1-day storage can be derived to be 6558 μg/m ² . In 1-day storage, suppression of 4 or more lesions cannot be calculated because it exceeds the average number of untreated lesions of 3.7.

Table 9 below shows the measured values of Examples 5, 6, and 7, and the number of days elapsed and ^the diameter of the The total amount of HClO that is required to reduce the number of lesions equivalent to 2 mm to 10 or less, 4 or less, and 1 or less is shown together.

In the table, the total HClO reaching amount of 7600 μg/m ² required to reduce the number of lesions equivalent to 2 mm in diameter to 1 or less on the second day was estimated from the total HClO reaching amount of 7575 μg/m ² in Table 7. Furthermore, the total amount of HClO reaching 11400 μg/m ² required for one or less lesions with a diameter of 2 mm on the third day can be estimated from the total amount of HClO reaching 11370 μg/m ² in Table 8. The total HClO arrival amount of 15,200 μg/m ² required for one spot equivalent or less can be estimated from the total HClO arrival amount of 15,150 μg/m ² in Table 7.

In addition, the total amount of HClO required to reduce the number of lesions equivalent to 2 mm in diameter to 4 and 10 or less on the 2nd, 3rd, and 4th days can be estimated from the sigmoid curve formula.

The total HClO arrival amount required to reduce the number of lesions equivalent to 2 mm in diameter to 1 or less on the first day is calculated from the sigmoid curve formula when the unit time HClO arrival amount is 350 μg / (m ² min) or less. Table 5 is quoted from Table 5 for the total amount of HClO required to reduce the number of lesions corresponding to 2 mm diameter lesions to 4 or less than 1 on the first day.

Therefore, when the amount of HClO reached per unit time exceeds 350 μg / (m ² · min), the total amount of HClO reached to suppress the number of lesions equivalent to 2 mm in diameter to 10 or less is within 2 days in high humidity conditions. It is defined as 1600 μg/m ² or more in cases where it is within 3 days, 3400 μg/m ² or more when within 3 days, and 8400 μg/m ² or more when within 4 days.

When the amount of HClO reached per unit time exceeds 350 μg / (m ² · min), the total amount of HClO reached to suppress the number of lesions equivalent to 2 mm in diameter to 4 or less is It is defined as 260 μg/m ² or more, 2,800 μg/m ² or more within 2 days, 6,700 μg/m ² or more within 3 days, and 10,600 μg/m ² or more within 4 days.

When the amount of HClO reached per unit time exceeds 350 μg/(m ² ·min), the total amount of HClO reached to suppress the number of lesions equivalent to 2 mm in diameter to 1 or less is It is defined as 3,500 μg/m ² or more, 7,600 μg/m ² or more within 2 days, 11,400 μg/m ² or more within 3 days, and 15,200 μg/m ² or more within 4 days.

Example 8
Place filter paper measuring 30 cm long and 20 cm wide in a plastic container measuring 420 mm long, 330 mm wide, and 140 mm high, and add 500 ml of hypochlorous acid water with a free available chlorine (FAC) concentration of 73 mg/kg. I put it in.

Cut flowers of roses (cultivar Avalanche) were obtained from a rose producer immediately after landing, placed in a test tube stand at regular intervals, and placed in a container. A transparent lid measuring 405 mm long, 315 mm wide and 105 mm high was placed on the container, and a hygrometer was inserted between the container and the lid.

The container was stored in an environment with an ambient temperature of 15° C. to 25° C. for 24 hours, and the cut flowers were sterilized by natural vaporization of the hypochlorous acid water.

The humidity in the container was almost 100%, and the amount of HClO reached per unit time was 38 μg/(min·m ² ) on average.

After 24 hours, a plastic container of the same size was filled with filter paper and filled with water. maintained in humidity. The container was stored at an ambient temperature of 15°C to 25°C for an additional 3 days. After 1, 2, 3, and 4 days from the start of the sterilization treatment, four plants were examined for disease caused by Botrytis.

The results obtained are shown in Table 10 below.

For comparison, after storing for 24 hours in the same manner except adding 500 ml of water instead of 500 ml of hypochlorous acid water, it was stored at high humidity for 3 days, and 1, 2, 3, and 4 days after the start of storage. After the lapse of time, disease onset due to gray mold was investigated for each of four plants.

The results obtained are shown in Table 10 below.

Example 9
A sterilization unit having the same configuration as in FIG. 23 was prepared, and 400 ml of hypochlorous acid water having a free available chlorine (FAC) concentration of 70 mg/kg was put therein.

Cut flowers were sterilized for 24 hours in the same manner as in Example 8, except that the sterilization unit was placed in a plastic container instead of putting the filter paper and electrolyzed water.

The humidity in the container was almost 100%, and the amount of HClO reaching per unit time was 13.4 μg/(min·m ² ) on average.

Then, similarly, they were stored at high humidity for 3 days, and after 1, 2, 3, and 4 days from the start of the sterilization treatment, 4 each of them were examined for disease caused by botrytis.

The results obtained are shown in Table 10 below.

Cut flowers were sterilized in the same manner as in Example 9, except that the cut flowers were sterilized for 96 hours. We investigated four.

The results obtained are shown in Table 10 below.

FIG. 25 shows a graph representing the relationship between the number of elapsed days and the number of lesions equivalent to 2 mm in diameter created based on Table 10. In FIG.

In FIG. 25, graphs 1201, 1202, 1203, and 1204 are respectively treated with water for 24 hours (comparison), treated in a container in which acidic electrolyzed water was naturally vaporized in a sterilization unit for 24 hours (Example 9), and were sterilized. Shows the results of 96-hour treatment in a container in which acidic electrolyzed water was naturally vaporized in a unit (Example 10), and 24-hour treatment in a container in which filter paper was impregnated with acidic electrolyzed water and allowed to naturally vaporize (Example 8). .

From Table 10 and FIG. 25, when the average HClO arrival amount per unit time is 38 μg / (m ² min) and stored in a high humidity space after sterilization for 24 hours, the number of 2 mm diameter lesions equivalent to 3 days after sterilization is 5. When stored in a high humidity space after sterilization for 24 hours with an average HClO arrival amount of 14.1 μg / (m ² min) per unit time, the number of lesions equivalent to 2 mm in diameter two days after sterilization is 15, unit It can be seen that when the average amount of HClO reached per hour was 14.1 μg/(m ² ·min) and the sterilization was performed for 96 hours, the number corresponding to 2 mm diameter lesions could be suppressed to 32.

Further, as shown in FIG. 25, when the acidic electrolyzed water was impregnated into the filter paper and treated for 24 hours in a container that was naturally vaporized, a sufficient sterilization effect was observed even after 4 days. is treated for 24 hours in a container in which is naturally vaporized, the sterilization effect is inferior. However, by treating for 96 hours in a container in which acidic electrolyzed water was naturally vaporized in the sterilization unit, the same effect as in the case of treating for 24 hours in a container in which filter paper was impregnated and naturally vaporized was obtained. I understand.

In order to define the total amount of HClO that is required for disease control of cut flowers, the results of Examples 8 to 10 were examined for the relationship between the total amount of HClO that reached and the number of lesions equivalent to 2 mm in diameter. The number y corresponding to 2 mm diameter lesions was plotted against the arrival amount x, and approximated by the sigmoid curve formula represented by the above formula (1).

FIG. 26 shows data representing the relationship between the total amount of HClO reached on the first day and the equivalent number of lesions with a diameter of 2 mm.

Here, the range of the number of lesions y in the control untreated plot is 10<y<34.

At this time, a=0.23833, b=-4.06963, c=7106.00793, d=20.41667, and correlation coefficient R ² =0.75110 in equation (1).

When the equivalent number of lesions with a diameter of 2 mm estimated from the approximate expression is 10, the total amount of HClO reached is 7220 μg/m ² , and when it is 4, the total amount of HClO reached is 10206 μg/m ² , and when it is 1, it is 15748 μg/m ² . .

From FIG. 26, it can be seen that when the total amount of HClO reached is 7220 μg/m ² or more, the number corresponding to lesions with a diameter of 2 mm can be suppressed to 10 or less for one day.

FIG. 27 shows data representing the relationship between the total amount of HClO reached on the second day and the equivalent number of lesions with a diameter of 2 mm.

Here, the range of the number of lesions y in the non-treated plot as a control is 35<y<68.

Moreover, at this time, a=46.08246, b=14.13147, c=18157.4624, d=2.07899, and correlation coefficient R ² =0.84233 in formula (1).

When the number corresponding to 2 mm diameter lesions estimated from the approximate expression is 10, the total amount of HClO reached is 20,214 μg/m ² , and when it is 4, it is 22,590 μg/m ² .

From FIG. 27, it can be seen that if the total amount of HClO reached is 20214 μg/m ² or more, the number corresponding to lesions with a diameter of 2 mm can be suppressed to 10 or less for 2 days.

FIG. 28 shows data representing the relationship between the total amount of HClO reached on day 3 and the equivalent number of lesions with a diameter of 2 mm.

Here, the range of the number of lesions y in the control untreated plot is 58<y<155.

At this time, a=99.02931, b=26.72381, c=20029.0089, d=7.60246, and correlation coefficient R ² =0.73408 in formula (1).

When the number corresponding to 2 mm diameter lesions estimated from the approximate expression is 10, the total amount of HClO reached is 22930 μg/m ² .

From FIG. 28, it can be seen that when the total amount of HClO reached is 22930 μg/m ² or more, the number corresponding to 2 mm diameter lesions can be suppressed to 10 or less for 3 days.

FIG. 29 shows data representing the relationship between the total amount of HClO reached on day 4 and the equivalent number of lesions with a diameter of 2 mm.

Here, the range of the number of lesions y in the control untreated plot is 189<y<235.

At this time, a=201.50817, b=11.30435, c=20674.7571, d=21.81753, and correlation coefficient R ² =0.87720 in formula (1).

When the equivalent number of lesions with a diameter of 2 mm estimated from the approximation formula is 22, the total HClO arrival amount is 38036 μg/m ² .

From FIG. 29, it can be seen that if the total amount of HClO reached is 38036 μg/m ² or more, the number corresponding to lesions with a diameter of 2 mm can be suppressed to 22 or less for 4 days.

Table 11 below summarizes the elapsed days, the number of lesions equivalent to 2 mm in diameter, and the total amount of HClO that was estimated from the approximation formula.

As shown in Table 11, when the HClO arrival amount per unit time is 5 to 60 μg / (m ² min), the total HClO arrival amount for suppressing the number equivalent to 2 mm diameter lesions to 10 or less is 7000 μg/m ² or more for 1 day or less, 20000 μg/m ² or more for 2 days or less, and 23000 μg/m ² or more for 3 days or less.

When the unit time HClO arrival amount is 5 to 60 μg / (m ² min), the total HClO arrival amount to suppress the number of lesions equivalent to 2 mm in diameter to 4 or less is 10000 μg/m ² or more, and 22500 μg/m ² or more if it is within 2 days.

When the unit time HClO arrival amount is 5 to 60 μg / (m ² min), the total HClO arrival amount to suppress the number equivalent to 2 mm diameter lesions to 1 or less is 1600 μg/m ² or more.

The following is a supplementary description of the inventions claimed in the earlier application immediately preceding this application.
[Appendix 1 ]
[1]
The hypochlorous acid water vaporized substance is supplied to the cut flowers after harvest and before transportation until the total HClO arrival amount (HClO arrival amount per unit time × treatment time) reaches 260 μg/m ² or more. A method for sterilizing cut flowers.
[2]
The method according to [1], wherein the total HClO arrival amount is 42000 μg/m ² or less.
[3]
The method according to [1] or [2], wherein the reaching amount of HClO per unit time is 5 to 700 μg/(m ² ·min).
[4]
The total HClO arrival amount is set according to the unit time HClO arrival amount and the transportation period, and when the unit time HClO arrival amount is 5 to 350 μg/(m ² min), the transportation period is 1 day or less. 260 μg/m ² or more if within 2 days, 4500 μg/m ² or more if within 3 days, 8500 μg/m ² or more if within 3 days, 14000 μg/m ^{2 or} more if within 4 days The method according to [3].
[5]
The total HClO arrival amount is 260 μg/m ² or more when the transportation period is 1 day or less, 8000 μg/m ² or more when the transportation period is 2 days or less, and 14000 μg/m ² or more when the transportation period is 3 days or less. The method according to [4], wherein if it is within 4 days, it is set to 19000 μg/m ² or more.
[6]
The total HClO arrival amount is 3500 μg/m ² or more when the transportation period is 1 day or less, 15000 μg/m ² or more when the transportation period is 2 days or less, and 22000 μg/m ^{2 or} more when the transportation period is 3 days or less. , the method according to [5], wherein if it is within 4 days, it is set to 23000 μg/m ² or more.
[7]
The total HClO arrival amount is set according to the unit time HClO arrival amount and the transportation period, and when the unit time HClO arrival amount is greater than 350 μg/(m ² ·min), the transportation period is 1 day or less. 260 μg/m ² or more if within 2 days, 1600 μg/m ² or more if within 3 days, 3400 μg/m ² or more if within 3 days, 8400 μg/m ² or more if within 4 days [3 ] The method described in .
[8]
The total HClO arrival amount is set according to the unit time HClO arrival amount and the transportation period, and when the unit time HClO arrival amount is greater than 350 μg/(m ² ·min), the transportation period is 1 day or less. 260 μg/m ² or more if within 2 days, 2800 μg/m ² or more if within 3 days, 6700 μg/m ² or more if within 3 days, 10,600 μg/m ^{2 or} more if within 4 days [7 ] The method described in .
[9]
The total HClO arrival amount is set according to the unit time HClO arrival amount and the transportation period, and when the unit time HClO arrival amount is greater than 350 μg/(m ² ·min), the transportation period is 1 day or less. 3,500 μg/m ² or more if within 2 days, 7,600 μg/m ² or more if within 3 days, 11,400 μg/m ² or more if within 3 days, 15,200 μg/m ² or more if within 4 days [8 ] The method described in .
In addition, the invention described in the scope of claims at the time of filing of the present application will be additionally described below.
[Appendix 2]
[2-1]
Vaporized hypochlorous acid water was added to the cut flowers after harvest and before transportation so that the total amount of HClO reached (amount of HClO reached per unit time in the ambient atmosphere of the cut flowers×treatment time) was 260 μg/m2 or more and 42000 μg/ ^m2 . A method for sterilizing cut flowers, characterized by supplying up to ² or less.
[2-2]
The unit time HClO arrival amount is 5 to 700 μg/(m ² min) [2-1]
The method described in .
[2-3]
The method according to [2-2] , wherein the total HClO arrival amount is set to 3500 μg/m ² or more and 23000 μg/m ² or less in accordance with the transportation period.
[2-4]
A method for sterilizing cut flowers, comprising supplying vaporized hypochlorous acid water to cut flowers, and maintaining an average amount of HClO reaching 5 to 60 μg/(m 2 ·min) per unit time in the surrounding atmosphere of the cut flowers ^.
[2-5]
Until the total amount of HClO reached (amount of HClO reached per unit time in the surrounding atmosphere of the cut flower x treatment time) reaches 7000 μg/m ² or more and 23000 μg/m ² or less within 24 hours, the ambient atmosphere is changed to the amount of HClO reached per unit time. and
The method according to [2-4], further comprising resupplying the vaporized hypochlorous acid water to the cut flower within 48 hours, and maintaining the surrounding atmosphere at the HClO reaching amount for the unit time.
[2-6]
The method according to any one of [2-1] to [2-4], wherein the ambient atmosphere around the cut flowers is further maintained at a humidity of 80% or higher.
[2-7]
The method according to any one of [2-1] to [2-4], further comprising storing the cut flowers at a humidity of 80% or higher after maintaining the amount of HClO reached per unit time.
[2-8]
A sterilization unit for supplying vaporized hypochlorous acid water used in the method according to any one of [2-4] to [2-7].
Furthermore, the invention described in the scope of claims as amended in the Written Amendment of Procedures submitted on October 19, 2020 of this application will be added below.
[Appendix 3]
[3-1]
Only at the timing after harvesting and before transportation of cut flowers from production to sale, the vaporized substance of hypochlorous acid water is applied to cut flowers. A method for sterilizing cut flowers, characterized in that the cut flowers are supplied until the treatment time) reaches 260 μg/m ² or more and 42000 μg/m ² or less.
[3-2]
The method according to [3-1] , wherein the amount of HClO reached per unit time is 5 to 700 μg/(m ² ·min).
[3-3]
The total HClO arrival amount is set to 3500 μg/m ² or more and 23000 μg/m ² or less according to the transportation period [3-2]
The method described in .
[3-4]
A method for sterilizing cut flowers, comprising supplying vaporized hypochlorous acid water to cut flowers by natural vaporization, and maintaining an average amount of HClO reaching 5 to 60 μg/(m 2 ·min) per unit time in the surrounding atmosphere of the cut flowers ^.
[3-5]
The ambient atmosphere is maintained at the HClO arrival amount per unit time until the total HClO arrival amount (HClO arrival amount per unit time in the ambient atmosphere of the cut flower x treatment time) reaches 7000 μg/m or more and 23000 μg/m or less within 24 hours. and
The method according to [3-4], further comprising resupplying the vaporized hypochlorous acid water to the cut flowers within 48 hours, and maintaining the surrounding atmosphere at the HClO reaching amount for the unit time.
[3-6]
[3-1] to [3-5] further maintaining the ambient atmosphere of the cut flowers at a humidity of 80% or more
A method according to any one of
[3-7]
The method according to any one of [3-1] to [3-5], further comprising storing the cut flowers at a humidity of 80% or higher after maintaining the amount of HClO reached per unit time.
[3-8]
A sterilization unit for supplying the vaporized substance of hypochlorous acid water used in the method according to [3-4] or [3-5] by natural vaporization.

While several embodiments of the invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

DESCRIPTION OF SYMBOLS 1... Cut flower sterilization system, 2... Storage part, 3... Dehumidification part, 10... Tank, 11... Piping, 12... Pump, 13..., 14... Control part, 15... Case, 16... Evaporation part, 17... Fan, 19...HClO total arrival amount prediction unit 20...Supply unit 23...Storage unit 30...Management system 40...Sterilization system 60, 70...Sterilization unit 100...Electrolyzer 112...First diaphragm 114...Second 2 diaphragms 115a intermediate chamber 115b anode chamber 115c cathode chamber 119a supply pipe 211 water supply unit 211a water supply pipe 211c drainage pipe 213 power supply 215 salt water tank

Claims (6)

When the transportation period is at least one day, the vaporized substance of hypochlorous acid water is added to the cut flowers only during the period from the production to the sale of the cut flowers after harvesting and before transportation. A method for sterilizing cut flowers, characterized in that the amount of HClO reached per unit time in the surrounding atmosphere of the plant×treatment time) is 3500 μg/m ² or more and 23000 μg/m ² or less. 2. The method according to claim 1, wherein the amount of HClO reached per unit time is 5 to 700 μg/(m ² ·min). Supplying hypochlorous acid water vaporized substance to cut flowers by natural vaporization, maintaining the amount of HClO reached per unit time in the atmosphere surrounding the cut flowers at an average of 5 to 60 μg / (m 2 min ) ^,
Until the total amount of HClO reached (amount of HClO reached per unit time in the surrounding atmosphere of the cut flower x treatment time) reaches 7000 μg/m ² or more and 23000 μg/m ² or less within 24 hours , the ambient atmosphere is changed to the amount of HClO reached per unit time. and
A method for sterilizing cut flowers, wherein the vaporized hypochlorous acid water is resupplied to the cut flowers within 48 hours, and the ambient atmosphere is maintained at the HClO reaching amount for the unit time. 4. The method according to any one of claims 1 to 3, wherein the atmosphere surrounding said cut flowers is further maintained at a humidity of 80% or higher. 4. The method according to any one of claims 1 to 3, further comprising storing the cut flowers at a humidity of 80% or higher after maintaining the amount of HClO reached per unit time. A sterilization unit for supplying vaporized hypochlorous acid water used in the method according to claim 3 by natural vaporization .

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