JP4942786B2 - Method and apparatus for controlling pests of cultivated plants with hot water or water having a temperature difference from outside air temperature - Google Patents

Description

  In the present invention, when a pest adheres to a cultivated plant, particularly a plant under hydroponics, the pest is killed by applying high-temperature water to the plant, or by applying water having a temperature difference from the outside temperature. The present invention relates to a pest control method and a pest control device for removing from a plant.

  In general, when high temperature water is applied to plants with pests attached, the effects of plants and pests (insects) on high temperature water are variable animals that are susceptible to the influence of outside air temperature. Small insects have very fast temperature propagation. Moreover, since most of the pests parasitic on plants tend to adhere to the surface of plants, it is known that when high temperature water is applied to plants with pests, the effect acts on pests faster than plants. Yes.

  Therefore, as for the prior art, Patent Document 1 discloses, as a pest control method, high-temperature water, the time that the body temperature of the pest is equal to or higher than the viable temperature, and the time that does not exceed the viable temperature of the plant is limited. As an example, an example of applying hot water at about 66 ° C. to 110 ° C. for a time not exceeding 5 seconds, about 66 ° C. to 100 ° C. on the plant and the soil in which it is planted An example of spraying hot water for a time not exceeding 5 seconds and an example of spraying ultrasonic hot water of about 66 ° C. to 427 ° C. for a time not exceeding 5 seconds to plants and soil are described.

  However, the above conventional method has a fatal defect. That is, no consideration is given to the roots of plants when high temperature water is applied to the plants. According to the inventor's experiments, plant roots, especially root hairs, are less resistant to heat. For example, root hairs such as spinach were necrotized at 38 ° to 40 ° C. for 15 to 10 seconds. Moreover, even if the root hair of a plant does not die, even if it suffers from some kind of damage, it suffers a great deal of damage to the growth of the plant. Nevertheless, in the above conventional method, high temperature water is applied to the soil in which the plant is planted.

JP-A-11-32646

  The present inventor has found a solution as a result of various studies on methods for preventing the high temperature water from reaching the roots of plants in order to improve the drawbacks of conventional pest control methods using high temperature water.

  Furthermore, the present inventor has conducted various studies and experiments on a method for controlling insects to be removed from plants instead of insecticides in order to avoid the unexpected adverse effects of high-temperature water as much as possible. Pests, which are temperature-changing animals, gradually adapt to changes in the outside air temperature and reach the same body temperature as the outside air temperature, but considering that the propagation of temperature to the whole body is extremely fast, It was an experiment to examine whether pests can adapt to it and stay healthy in plants when water with a temperature difference is drastically applied to the pests. As a result of the experiment, the pests fell off the plants. This is thought to be a result of the sudden temperature change caused by the water used giving a so-called temperature shock to the pest, which paralyzes the function of staying in the pest plant.

The water used may have a temperature higher than the outside air temperature or a temperature lower than the outside air temperature, and the treatment time is several seconds to 1 minute. Further, the temperature shock works more effectively as the temperature difference between the used water and the outside air temperature is larger, but the upper limit temperature of the used water is about 50 ° C., which has an adverse effect on plants, and the lower limit is about 10 ° C.
The temperature condition of the water used is one guideline and is appropriately selected depending on the type of pests.

  The first problem of the present invention is to provide a pest control method for killing pests adhering to a plant with high-temperature water while sufficiently protecting the roots of the plant, which has not been a conventional method.

  The second problem of the present invention is to provide a method for controlling pests that causes the pests attached to the plants to be removed from the plants by using water at a temperature lower than that of the high-temperature water in order to avoid adverse effects caused by the use of the high-temperature water as much as possible. That is.

  The third problem of the present invention is to provide a pest control apparatus that can effectively carry out the pest control method.

As means for solving the first problem, the first invention of the present application is:
The plant is inverted with the pests attached to the pests, with the roots facing up, and the roots are shielded from the high-temperature water placed in the tank with a heat insulating material. Soak only in the above high temperature water for the required time,
The immersion in the high-temperature water is performed at the temperature and immersion time of the high-temperature water that kills the pests without necrotizing the plant leaf stems.
Proposed pest control method for cultivated plants with hot water,

The second invention of the present application is
The plant is inverted with the pests attached to the pests down and the roots facing up, and hot water is sprayed onto the downstems for the required time, while the roots are sprayed at high temperature with a heat insulating material. Shield from water,
The injection of the high-temperature water is performed at the temperature and injection time of the high-temperature water that kills the pests without necrotizing the plant leaves and stems.
Proposed pest control method for cultivated plants with hot water,

The third invention of the present application is
Before or after applying the high-temperature water in the first or second invention to the plant leaf stem portion, cool the leaf stem portion by applying low-temperature water to the plant leaf stem portion,
A pest control method for cultivated plants using high temperature water is proposed.

As a means for solving the second problem, the fourth invention of the present application is
The plant is inverted with the pests attached to the pests and the roots facing up, and the above-mentioned downwards are rapidly required in water that has a temperature difference from the outside temperature in the tank. Immerse for a while, if necessary, shield the root from the water with a heat insulating material if necessary,
The immersion in water having a temperature difference from the outside air temperature is performed at a temperature and an immersion time at which the insect pests adhering to the leaf stem portion are subjected to a temperature shock to be detached from the leaf stem portion and do not adversely affect the leaf stem portion. ,
Proposal of pest control method for cultivated plants with water with temperature difference from outside temperature,

The fifth invention of the present application is
The plant is inverted with the pests attached to the pests and the roots facing up, and the downward foliage is rapidly sprayed with water having a temperature difference from the outside air temperature, and if necessary, the above Shield the root from the above jet water with a heat insulating material,
The injection of water having a temperature difference from the outside air temperature is performed at a temperature and an injection time at which a pest adhering to the leaf stem portion is subjected to a temperature shock to be detached from the leaf stem portion and does not adversely affect the leaf stem portion.
We propose a method for pest control of cultivated plants using water with temperature difference from outside temperature.

Furthermore, as a means for solving the third problem, the sixth invention of the present application is
Forming a lower travel path that feeds the endless drive belt around the drive vehicle and the driven vehicle that are pivotally supported at a wide interval, and then reverses the upper travel path,
In the endless belt, a box made of a heat-insulating material, containing a root in an internal root storage chamber, and a large number of plant cultivation boxes with leaf stems protruding from the top surface of the box are adjacent in the running direction. Connected to each other, and driven by the endless belt, the cultivation box is driven in a normal posture with the leaf stem portion facing upward on the upper traveling road, and then in an inverted posture with the leaf stem portion facing downward on the lower traveling road. ,
Any one of the immersion tank or spray chamber to which hot water or water having a temperature difference from the outside air temperature should be applied to the downward leaf stem portion of some cultivation boxes among the cultivation box group leading to the lower traveling path. Or a plurality are arranged so as to be movable up and down from the downward retracted position to the application position,
Proposed pest control equipment for cultivated plants,

The seventh invention of the present application is
Plant roots are housed in a root storage chamber inside the box made of heat-insulating material, and a large number of plant cultivation boxes with leaf stems protruding from the top surface of the box are turned upside down on the left and right support bases in a state adjacent to each other Support possible,
One or a plurality of immersion tanks or spray chambers to which high temperature water or water having a temperature difference from the outside air temperature should be applied to the downward leaf stem portion of the cultivation box group when the cultivation box is inverted. A pest control device for a cultivated plant that is arranged so as to be movable up and down from a lower retreat position to an application position and supported so as to be able to move under each cultivation box is proposed.

  According to the first and second inventions of the present application, in the inverted state in which the plant is rooted upward and the leaf stem portion is directed downward, hot water is applied to the downward leaf stem portion. Not only is there no danger of flowing down, but also in any method of immersion in high-temperature water or jetting of high-temperature water, the ease of processing on the leaf stem portion hanging downward is a great advantage. Moreover, since the roots that are vulnerable to high temperatures are shielded by a heat insulating material, the roots can be prevented from high temperature water when immersed in high temperature water and sprayed with high temperature water, and further work safety can be ensured.

  In addition, according to the third invention of the present application, if the leaf stem portion is cooled before the high temperature water treatment, the leaf stem portion becomes low temperature, and the time for the influence of the high temperature water to propagate to the plant body can be delayed. Cooling the leaves and stems after treatment can lower the temperature of the plant body whose temperature has risen and prevent high temperature damage such as leaf burning, and further cooling before and after high temperature water treatment can reduce the incidence of high temperature damage. In addition to being able to lower the temperature, the temperature of the high-temperature water to be applied to the leaf stem portion can be increased, and the treatment time can be increased to increase the pest control rate.

  In the fourth and fifth inventions of the present application, a temperature shock is applied to the pest by water having a temperature difference from the outside air temperature, and the pest is separated from the plant. Therefore, the first and second inventions are used to kill the pest. Water having a relatively lower temperature than that of water is sufficient, thereby making it possible to sufficiently suppress adverse effects on the leaf stems.

  According to the sixth and seventh inventions of the present application, it is sufficient to prepare a small immersion tank corresponding to a part of the cultivation boxes, a small amount of high-temperature water in the injection chamber, etc., which is economically advantageous. In addition, there is an advantage that temperature management of high-temperature water or the like becomes easy.

(A), (b) It is a basic diagram which shows the Example of the insect pest control method by immersion to high temperature water. (A), (b) It is a basic diagram which shows the other Example of the insect pest control method by immersion in high temperature water. It is a basic diagram which shows the Example of the insect pest control method by high temperature water injection. It is an approximate line figure showing an example of a pest detachment extermination method by immersion in temperature water different from outside temperature. It is an approximate line figure showing an example of a pest detachment extermination method by injection of temperature water different from outside temperature. It is a basic diagram which shows the Example of the insect pest control method by the high temperature water injection accompanying cooling. (A) A partially omitted vertical side view of the pest control apparatus. (B) It is an expansion vertical side view of an immersion tank part. (C) It is an enlarged vertical side view of the injection chamber portion. It is a top view of the other example of a pest control apparatus. It is the sectional view on the AA line of FIG.

  In the present invention, the “inverted state with the leaf stem portion down and the root facing up” includes not only a vertical state but also an inclined state.

  “Shielding the root with high-temperature water or temperature water with a heat insulating material” means that the root is formed with a synthetic resin foam such as polystyrene foam, rubber, synthetic wood or other boxes or covers made of various heat insulating materials. It is to block high temperature water. As for the box type, the cultivation type box for supplying and discharging the culture solution into the root storage chamber with the roots stored in the root storage chamber formed in the box and the leaf stems protruding on the box is not changed. Can be used as a root shielding box.

  In addition, when a plant is planted on a panel such as a polystyrene foam plate that has been widely used in the past, and the roots protrude below the panel and are immersed in the culture solution, If the panel itself shields high-temperature water from the bottom, and the heat insulating cover is covered with the root on the panel, the shielding is further sufficient.

  In order to ensure further safety from the hot water of the root, a method of blowing cold air, particularly preferably high-humidity cold air, to the root at the time of high-temperature water treatment may be employed.

（２）植物の壊死を起すに要する温度と処理時間を次に示す

実際に施用される高温水の温度及び処理時間は、植物及び害虫の種類、気温、湿度等に応じて適宜選択される。 (1) The temperature and treatment time required for killing the pest by the present inventor are as follows.

(2) The temperature and treatment time required to cause plant necrosis are shown below.

The temperature and treatment time of the hot water actually applied are appropriately selected according to the types of plants and pests, the temperature, the humidity, and the like.

Example of the first invention As shown in FIG. 1 (a), the support rails (2) and (2) are supported by a styrene foam insulative cultivation box (1). When the roots are housed in the inner root storage chamber, and the leaf stem is protruding from the upper surface of the box, the culture solution is supplied to and discharged from the root storage chamber to grow spinach (P). This is an example of killing the white butterfly larvae and aphids attached to the stem with high-temperature water.

  As shown in FIG. 2B, high-temperature water (4) heated to 50 ° C. is poured into the immersion tank (3). The cultivation box (1) ... planted with spinach (P) ... is run on the support rails (2), (2) to the top of the immersion tank (3), where the cultivation box (1) ... Invert the roots up, so that the leaf stems are immersed in hot water (4). Immerse for 10 seconds and raise immediately.

  By immersing in the high-temperature water at 50 ° C. for 10 seconds, the white butterfly larvae and aphids could be killed without causing any damage to the spinach. Most of the dead pests sink to the bottom of the high-temperature water and are collected by the filtration device provided in the immersion tank (3).

Other Embodiments of the First Invention As shown in FIG. 2 (a), cosmetus (Pa) is planted on a polystyrene foam insulation panel (1a), with its leaf stems on the panel and the roots below the panel. In the protruding state, when growing on the liquid surface of the culture solution (7a) in the cultivation tank (6a), the insects and aphids were attached to the leaf stems. This is an example.

  The above cosmetus planting panel (1a) is inverted to a state in which the stems are on the bottom and the roots are on the top, and on the upper surface of the panel (1a) is a heat insulating cover having a cup-shaped cross section made of polystyrene foam. 8a) is covered to cover the roots, and in that state, the panel (1a) is transferred onto the hot water (4a) of the immersion tank (3a), and the leaf stem is immersed in hot water at 50 ° C. for 8 seconds.

  At the time of the immersion, the panel (1a) is supported on the support bases (9a) and (9a), and the panel (1a) is preferably separated from the liquid surface of the high temperature water (4a).

  By immersing the leaves and stems in the high-temperature water at 50 ° C. for 8 seconds, the weevil and aphids could be killed without causing any damage to the kosletus (Pa).

  In Examples 1 and 2, the cultivation boxes (1), (1a), etc. may be floated on the water surface of the high temperature water (4), (4a) to perform the high temperature treatment.

Example of Second Invention In the same manner as in FIG. 1 (a), when weevil and aphids are attached to the leaf stems of the chisha planted in the cultivation box (1b), the insects are controlled by spraying high temperature water. It is an example.

  The cultivation box (1b) in which the above-described chisha is planted is moved onto the spray chamber (10b) opened on the upper surface as shown in FIG. 3, where each cultivation box (1b) is inverted with its leaf stems down. In this state, high temperature water at 50 ° C. is sprayed from the nozzle of the high temperature water supply pipe (11b)...

  By spraying the high temperature water at 50 ° C. for 20 seconds, the pests are killed without causing any damage to the tissue. Since most of the dead pests fall on the floor of the injection chamber (10b), they are collected and disposed of as appropriate.

Example of Fourth Invention As in FIG. 1 (a), when cultivating syringae in a cultivation box (1c)..., The aphids and ladybirds adhere to the leaf stems, which is different from the outside air temperature. It is an example of the extermination which makes a pest detach | leave from a leaf stem part by immersing in the water (shock water) of temperature.

  As shown in FIG. 4, the temperature shock water (5c) of 38 ° C. is injected into the immersion tank (3c) under an outside air temperature of 24 ° C. The cultivation box (1c)... In which the above garland is planted is moved onto the immersion tank (3c), where each cultivation box (1c) is inverted and each leaf stem portion is rapidly put into the shock water (5c). Immerse in. Immersion is performed for 8 seconds.

  Under an outside air temperature of 24 ° C., the aphids and ladybirds were subjected to a temperature shock by rapidly immersing them in water at 38 ° C., which was higher than that temperature, and were released from the leaf stems. The leaf stem is not damaged at all. Most of the pests that have withdrawn are paralyzed by temperature shocks, but some may be dead or dead.

  The detached pests sink into the immersion liquid or float on the liquid surface, but the former is collected by the immersion liquid filtration device, and the latter is appropriately collected and disposed of.

Example of Fifth Invention As in FIG. 1 (a), scallops and aphids are attached to the leaf stems of the chisha planted in the cultivation box (1d)... This is an example of removing from a plant.

  Under an outside air temperature of 35 ° C., the cultivation box (1d) in which the chisha was planted was moved over the upper-side jet chamber (10d) containing water (14d) as shown in FIG. The cultivation box (1d) is inverted with its leaf stems down, and in that state, the shock water at 15 ° C., which is lower than the outside air temperature of 35 ° C., from the nozzle of the shock water supply pipe (12d) in the injection chamber (10d). (5d) was rapidly sprayed onto the leaf stem. The injection time was 10 seconds.

  Caterpillars and aphids were detached from the leaf stems by the above temperature shock and dropped.

  The pest that has fallen sinks into the indoor water (14d) or floats on the surface of the water, the former is collected by a filtering device, and the latter is collected and disposed of appropriately.

It is an example which inject | pours cold water before and after injecting high temperature water, and cools, when a weevil adheres to the leaf stem part of the Mizuna planted in Example cultivation box (1e) ... of 3rd invention .

  As shown in FIG. 6, the cultivation box (1e)... In which Mizuna (Pe) is planted is moved above the injection chamber (10e), where the cultivation box (1e). First, low-temperature water at 15 ° C. is sprayed from the nozzles of the cooling water supply pipe (15e) in the spray chamber (10e) to the leaf stem portion for 10 seconds to cool. Next, high temperature water at 55 ° C. is sprayed from the nozzle of the high temperature water supply pipe (11e) for 20 seconds to kill the weevil, and then low temperature water at 15 ° C. is sprayed again from the nozzle of the cooling water supply pipe (15e) for 10 seconds. And cool the leaf stem.

  With the above cooling treatment, it was possible to kill and exterminate pests while maintaining a safe Mizuna for a high temperature treatment at 55 ° C. for 10 seconds, which is dangerous for Mizuna.

Embodiment 6 of the Sixth Invention In FIG. 7 (a), the drive shaft (16f) and the driven shaft (17f) are supported on the front and rear ends of the frame (Ff), and each of the drive shaft (16f) and the driven shaft (17f) is supported. Drive sprockets (18f), (18f), driven sprockets (19f), (19f) are fixed to the left and right ends, respectively. These left and right drive sprockets (18f), driven sprockets (19f), (18f), (19f) The endless chains (20f) and (20f) are respectively wound around the two endless chains, and a straight upper traveling path (U) and a lower traveling path (D) that reverses and extends in the opposite direction are then formed. Formed and connected to these left and right endless chains (20f), (20f) a number of cultivation boxes (1f) ... with drum-shaped short side faces, with their drum-shaped arc-shaped surfaces adjacent to each other Have Rotation is transmitted from the motor to the drive shaft (16f) via a speed reducer.

  The cultivation box (1f) is cultivated in a normal posture with the culture solution fed and discharged into the root storage chamber when the upper running path (U) is located, and the leaf stem portion facing upward. (20f), (20f) is driven to drive the sprocket (18f), the lower travel path (D) is reversely fed in a reverse posture with the leaf stem part down, and each cultivation is performed in both travel paths (U), (D). Box (1f)... Constitutes one roof as a whole.

  Below the lower travel path (D), in this example, a high-temperature water immersion tank (3f) corresponding to the width of two rows of cultivation boxes (1f) and a shock water injection chamber (10f) of the same width for two rows of boxes. ) Are supported by the air cylinders (21f) and (22f) so as to be movable up and down, and when the air cylinders (21f) and (22f) are lowered by the reduction driving, each cultivation box (1f) is driven. Even if the leaf stems are turned down around the sprocket (18f), the leaf stems are lowered to the lower retreat position so that they can proceed to the lower traveling path (D) without hindrance. When it is lifted by the extension drive of (21f), (22f), the dipping tank (3f), the spray chamber (10f) comes into contact with the lower surface of the cultivation box (1f), or rises to the close application position, and the dipping tank (3f) Smell The two rows of cultivation boxes (1f) ... soak the downward leaf stems in high temperature water (4f), and place them in the spray chamber (10f) to shock the downward leaf stems of two rows. It is in a position where it can receive jet water from the water supply pipe (12f).

Example of Seventh Invention As shown in FIGS. 8 and 9, each cultivation box (1 g)... Has a short side surface formed in an inverted trapezoidal shape, and shafts (23 g) and (23 g) are formed on both side surfaces thereof. These projecting boxes (1g) are rotated on bearings (24g) (24g) fixed on the left and right support bases (2g) and (2g), and the shafts (23g) (23g) are rotated. Supports the long side surfaces in a state of adjoining each other freely, and each cultivation box (1g)... Is in a normal posture with the leaf stem portion facing up, and a reverse posture inverted upside down. At the time of (state of FIG. 9), the long side portions corresponding to both end portions of the lower side in the trapezoid of the side surface are brought into contact with each other, and the entire cultivation box (1g) constitutes one roof.

  The mechanism for turning the cultivation box (1g)... Supported upside down as described above is as follows. The inner side sprocket (25g) and the outer side sprocket (26g) are respectively fixed to the shaft (23g) ... on one side of each cultivation box, and first, a driving sprocket of a rotation angle control type motor (rotating 180 degrees in this example) (27g) (28g) and the inner chain sprocket (25g) of the first cultivation box are multiplied by the first chain (29g), then the outer sprocket (26g) of the first cultivation box and the outer sprocket (26g of the second cultivation box) ) Is multiplied by the second chain (30 g), the inner chain sprocket (25 g) of the second cultivation box and the inner chain sprocket (25 g) of the third cultivation box is multiplied by the third chain (31 g), and so forth. Multiply the chain (32g) and the chain (n) up to the sprocket (26g) of the last cultivation box.

  In this way, each cultivation box (1g)... Repeats 180 ° rotation by 180 ° rotation of the motor (27g), and reverses from the normal posture to the reverse posture and then to the normal posture.

  Under the cultivation box (1g), rails (31g) and (31g) are laid along the box arrangement direction, and the carriage (32g) mounted on the rails (31g) and (31g) so as to run freely. ) An air cylinder (22g) is installed above, and a temperature shock water injection chamber (10g) having a width corresponding to two rows of cultivation boxes in this example is supported on the cylinder (22g) so as to be movable up and down.

  In this example, each cultivation box (1 g)... Is supported by a support stand (2 g), and after the leaf stem portion is inverted on (2 g), the injection chamber (10 g) is grown by the expansion drive of the air cylinder (22 g). The temperature shock water is raised to the position where it abuts against the two rows (1 g) and (1 g), and the temperature shock water is sprayed from the nozzles of the shock water supply pipes (12 g) and (12 g) to the leaf stems for the required time, and then injected. After lowering the chamber (10 g) below the leaf stem part, the carriage (32 g) is moved backward by the distance of two rows of cultivation boxes, and the injection chamber (10 g) is moved to two rows of new cultivation boxes. The temperature shock water is sprayed onto a new leaf stem portion by ascending and contacting, and this is repeated thereafter.

1, 1b, 1c, 1d, 1e, 1f, 1g Insulation cultivation box 1a Insulation panel 3, 3a, 3f High temperature water immersion tank 3c Shock water immersion tank 10b High temperature water injection chamber 10d, 10f, 10g Shock water injection chamber

Claims (7)

The plant is inverted with the pests attached to the pests, with the roots facing up, and the roots are shielded from the high-temperature water placed in the tank with a heat insulating material. Soak only in the above high temperature water for the required time,
The immersion in the high-temperature water is performed at the temperature and immersion time of the high-temperature water that kills the pests without necrotizing the plant leaf stems.
Pest control method for cultivated plants with hot water. The plant is inverted with the pests attached to the pests down and the roots facing up, and hot water is sprayed onto the downstems for the required time, while the roots are sprayed at high temperature with a heat insulating material. Shield from water,
The injection of the high-temperature water is performed at the temperature and injection time of the high-temperature water that kills the pests without necrotizing the plant leaves and stems.
Pest control method for cultivated plants with hot water. Before or after applying the high-temperature water to the plant leaf stem part, cool the leaf stem part by applying low temperature water to the plant leaf stem part,
The pest control method for cultivated plants with high-temperature water according to claim 1. The plant is inverted with the pests attached to the pests and the roots facing up, and the above-mentioned downwards are rapidly required in water that has a temperature difference from the outside temperature in the tank. Immerse for a while, if necessary, shield the root from the water with a heat insulating material if necessary,
The immersion in water having a temperature difference from the outside air temperature is performed at a temperature and an immersion time at which the insect pests adhering to the leaf stem portion are subjected to a temperature shock to be detached from the leaf stem portion and do not adversely affect the leaf stem portion. ,
Pest control method for cultivated plants using water with temperature difference from outside temperature. The plant is inverted with the pests attached to the pests and the roots facing up, and the downward foliage is rapidly sprayed with water having a temperature difference from the outside air temperature, and if necessary, the above Shield the root from the above jet water with a heat insulating material,
The injection of water having a temperature difference from the outside air temperature is performed at a temperature and an injection time at which a pest adhering to the leaf stem portion is subjected to a temperature shock to be detached from the leaf stem portion and does not adversely affect the leaf stem portion.
Pest control method for cultivated plants using water with temperature difference from outside temperature. Forming a lower travel path that feeds the endless drive belt around the drive vehicle and the driven vehicle that are pivotally supported at a wide interval, and then reverses the upper travel path,
In the endless belt, a box made of a heat-insulating material, containing a root in an internal root storage chamber, and a large number of plant cultivation boxes with leaf stems protruding from the top surface of the box are adjacent in the running direction. Connected to each other, and driven by the endless belt, the cultivation box is driven in a normal posture with the leaf stem portion facing upward on the upper traveling road, and then in an inverted posture with the leaf stem portion facing downward on the lower traveling road. ,
Any one of the immersion tank or spray chamber to which hot water or water having a temperature difference from the outside air temperature should be applied to the downward leaf stem portion of some cultivation boxes among the cultivation box group leading to the lower traveling path. Or a plurality are arranged so as to be movable up and down from the downward retracted position to the application position,
Pest control device for cultivated plants. Plant roots are housed in a root storage chamber inside the box made of heat-insulating material, and a large number of plant cultivation boxes with leaf stems protruding from the top surface of the box are turned upside down on the left and right support bases in a state adjacent to each other Support possible,
One or a plurality of immersion tanks or spray chambers to which high temperature water or water having a temperature difference from the outside air temperature should be applied to the downward leaf stem portion of the cultivation box group when the cultivation box is inverted. A pest control device for a cultivated plant that is disposed so as to be movable up and down from a downwardly retracted position to an application position and supported so as to be able to move under each cultivation box.

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