JP7017729B2 - Protective cover - Google Patents

Description

The present invention relates to a protective cover for protecting a pest control agent from rainfall, exposure to pesticides, and feeding damage such as rats and slugs.

At present, the mainstream of pest control of agricultural products is control using chemical substances such as pesticides and bactericides, but pests that are intended to be controlled by minimizing the impact on other ecosystems. Means for specific control of only are being used. For example, an integrated pest management (IPM) method using a predatory natural enemy organism (for example, Patent Documents 6 and 7) and a communication disrupting agent using a sex pheromone of a pest (Patent Documents 4 and 5) can be mentioned.

In the IPM method, pests are maintained at a low density by pre-establishing and multiplying natural enemy organisms that have predatory ability on crops before the occurrence of pests. It is necessary to grow on the alternative diet of. For this purpose, a product containing bran, yeast, and prey organisms in a bottle together with natural enemy organisms, or a pack formulation in which these ingredients are placed in a bag made of non-woven fabric and provided with a paper hanging means. Is on sale. The pack formulation is advantageous in that it can be installed while maintaining the growth environment, but if the pack formulation is installed as it is, it becomes difficult to maintain the growth environment due to direct exposure to rainfall and pesticides. It is also susceptible to feeding damage by mice and slugs.

In order to maintain the natural enemy organisms in the field of crop cultivation for a long period of time even if the number of pests is reduced, there is a technology to put the natural enemy organisms directly or the pack preparation containing them into a breeding device that secures food and spawning ground. It has been devised (Patent Documents 1, 2, and 3). Such an apparatus is also an effective means for protecting the pack preparation from rainfall, direct exposure to pesticides, and feeding damage caused by rats, slugs, and the like.

However, these devices are expensive to manufacture and require the assembly work of the devices at the agricultural site. In addition, no particular consideration was given to the temperature and humidity inside the device, and it did not necessarily have an advantage over the pack formulation in terms of the growth of natural enemy organisms and the effect of controlling pests.

On the other hand, the present inventor uses the suspension of the pest control pack preparation having a suspension as a means of protecting the pest control pack preparation from the external environment, which has a low manufacturing cost and can be easily installed by the producer of agricultural products. We have proposed a protective cover that can cover the entire body including and can be suspended with a pharmaceutical product (Patent Document 8). However, this protective cover also has room for improvement in that it keeps the temperature and humidity in the pack formulation in a state suitable for natural enemy organisms.

JP-A-2007-325541 JP-A-2010-187606 Patent No. 5681334 Japanese Patent Application Laid-Open No. 2014-237625 Patent No. 3913809 JP 2006-109726 JP 2006-158348 Patent No. 6016995

The present invention provides a protective cover that protects the pest control preparation from the external environment such as rainfall, pesticide spraying, and feeding damage such as mice and slugs, and maintains the temperature of the internal environment within a range suitable for natural enemy organisms. With the goal.
It is also an object of the present invention to provide, in a preferred embodiment, a protective cover capable of further maintaining humidity within a suitable range for natural enemy organisms.
It is further an object of the present invention to provide, in another preferred embodiment, a protective cover having the above-mentioned characteristics, having a low manufacturing cost, and being easily manufactured and installed.

In order to solve the above problems, the present invention provides the following protective cover.

[1] A protective cover for a pest control pack formulation containing natural enemy organisms.
A protective cover having a multi-layer structure consisting of multiple bags, at least the outer bag is waterproof and at least one bag is heat shield.
[2] The protective cover according to [1], wherein at least one inner bag is heat-shielding.
[3] At least one inner bag comprises paper (typically "consisting") coated with a white coating on at least the outer surface, preferably a white inorganic material, [1] or [2]. ] The protective cover described in.
[4] The outer bag contains a paper having a white coating on at least the outer surface, preferably a white inorganic material, and is water repellent (typically "consisting of"), [1] to The protective cover according to any one of [3].
[5] The protective cover according to [4], wherein the outer bag is further heat-shielding.
[6] Any of [1] to [5], wherein the outer bag and the inner bag have a drainage port, and a path through which water can pass is formed between the inner bag and the outer bag. The protective cover described in item 1.
[7] The left and / or right ends of the inner bag are located inside the left and / or right ends of the outer bag, thereby providing a path through which water can pass between the inner bag and the outer bag. The protective cover according to [6], which is formed.
[8] The left end and / or the right end of the inner bag is folded back by a valley fold, whereby a path through which water can pass is formed between the inner bag and the outer bag [6]. ] The protective cover described in.
[9] The inner bag is gathered (bellows-folded) to form a path through which water can pass between the outer surface of the inner bag and the inner surface of the outer bag, according to [6]. Protective cover.
[10] The protective cover according to any one of [6] to [9], wherein the inner surface of the outer bag and / or the outer surface of the inner bag adjacent to the outer bag is water repellent.

Since the protective cover according to the present invention has a multi-layer structure composed of a plurality of bags, the plurality of bags and the air existing between the bags enables multi-stage heat shielding or heat insulation, whereby the packed formulation is held. It is possible to suppress an increase in the temperature of the internal space. Further, as described above, each bag itself is not required to have such a high heat-shielding property because of the multi-stage heat-shielding or heat-insulating, and can be made of various materials. Further, such a structure in which bags are stacked can be easily manufactured by using an existing bag.
In addition, the protective cover according to the present invention protects the pack formulation from the ingress of water due to rainfall, etc. through the multi-stage barrier due to the multi-layer structure, and in particular, it is possible to form various drainage routes by utilizing the space between the bags. Through this, the pack formulation is protected from water ingress.

Here, some terms used in the present specification are defined.
As used herein, the term "waterproof" means the property that water does not substantially seep into the interior even when exposed to the rainfall that is encountered on a daily basis. Such properties are evaluated from the aspects of water resistance, water repellency, etc., and can be evaluated, for example, by the water resistance measured by the Stecicht sizing test method for paper, which is carried out in accordance with the provisions of JIS P 8122 (1976). In the specification of the present application, those having a size degree of 20 seconds (in the air in a standard state) or more can be regarded as "waterproof". Further, when "water repellency" is used to impart "water repellency", the evaluation can be made with "water repellency". Here, "water repellency" means the property of repelling water to remove water from the surface of each bag, and in the present specification, a material having R8 or higher in the test specified in JIS P 8137 is "water repellent". ".
Further, in the present specification, "light-shielding property" means a property of preventing long-wavelength radiation from entering even when the solar radiation is reflected or absorbed. However, when the term "light-shielding property" is used in the present specification, it is regarded as "light-shielding property" if the light transmission amount is 50% or less in a test measured by an illuminance meter using a light source for white illumination. vinegar. The "heat-shielding" material in the present invention is typically a white "light-shielding" material.
The term "inner bag" as used herein includes not only a bottomed bag but also a bottomless cylindrical form.

The protective cover according to one embodiment of the present invention is schematically shown. The state where the opening of the protective cover shown in FIG. 1 is slightly widened and viewed from above (X direction) is shown. The protective cover according to another embodiment of the present invention is schematically shown. The opening of the protective cover shown in FIG. 3 is slightly widened to show a state seen from above (X direction). A protective cover according to still another embodiment of the present invention is schematically shown. The state where the opening of the protective cover shown in FIG. 5 is slightly widened and viewed from above (X direction) is shown. A protective cover according to still another embodiment of the present invention is schematically shown. A state in which the opening of the protective cover shown in FIG. 7 is slightly widened and viewed from above (X direction) is shown. A protective cover according to still another embodiment of the present invention is schematically shown. A state in which the opening of the protective cover shown in FIG. 8 is slightly widened and viewed from above (X direction) is shown. The cross section of XI-XI of the embodiment shown in FIG. 9 is schematically shown. A protective cover according to still another embodiment of the present invention is schematically shown. A state in which the opening of the protective cover shown in FIG. 12 is slightly widened and viewed from above (X direction) is shown. The method of attaching the protective cover shown in FIG. 1 is schematically shown. The suspension provided by the protective cover according to still another embodiment of the present invention is schematically shown. The suspension provided by the protective cover according to still another embodiment of the present invention is schematically shown. A mounting portion of the protective cover according to still another embodiment of the present invention is schematically shown. A protective cover according to still another embodiment of the present invention is schematically shown. A state in which the tongue piece of the protective cover of FIG. 18 is bent to close the opening is schematically shown. The protective cover of Example 1 is shown. The method of performing the test for evaluating the release state of the fog mite is outlined. In the test for evaluating the release state of fog mites, the number (cumulative) of fog mites released in the test group and the control group is shown.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. However, the present invention should not be understood in a limited manner by these embodiments.

FIG. 1 schematically shows a protective cover according to an embodiment of the present invention. 1 indicates an outer bag (outer layer), 2 indicates an inner bag (inner layer), 3 indicates a pest control pack preparation, 4 and 5 indicate a drain port, 6 indicates a water passage route, and 7 indicates. Indicates a portion where the outer bag (outer layer) and the inner bag (inner layer) are mutually fixed (glued). FIG. 2 shows a state in which the opening of the protective cover of this embodiment is slightly widened and viewed from above (X direction). 3, 5, 7 and 9 schematically show protective covers according to other embodiments of the present invention, and FIGS. 4, 6, 8 and 10 slightly widen the opening of the protective cover according to these embodiments. A state seen from above (X direction) is shown, and FIG. 11 schematically shows a cross section of the embodiment shown in FIG.
As shown in FIGS. 1, 3, 5, 7 and 9, the protective cover 10 according to the present invention contains the pest control pack preparation 3 containing natural enemy organisms, and is exposed to rainfall and pesticides, as well as feeding damage to rats and whales. The pest control pack formulation 3 is protected from the above, and as described above, a plurality of bags including at least an outer bag 1 in contact with the external environment and at least an inner bag 2 forming an internal space in which the pest control pack formulation is held. It has a multi-layer structure to be formed. With such a multi-layer structure, multi-stage heat insulation and heat insulation are performed through a plurality of bags and the air existing between them, the temperature rise of the internal space where the pack formulation is held is suppressed, and water infiltration due to rainfall or the like is suppressed. In some cases, it is protected by a drainage route utilizing such a structure through a multi-stage barrier.

Since the protective cover 10 suppresses an increase in the temperature of a desired space through multi-stage heat shielding and heat insulation, high heat shielding properties are not required for each bag 1 and 2, and the bag is not a material having endothermic properties. A part of 1 and 2 may be made of general-purpose paper, and may be made of white paper such as thin leaf paper, for example. On the other hand, in order to impart the desired heat-shielding property to the protective cover 10, a part of the bag constituting the protective cover 10 has a light-shielding property (illuminance meter using a light source for white illumination) so that at least the opposite side cannot be seen through with the naked eye. It is preferable to use white paper having a light transmission amount of 50% or less in the test measured in. For example, white paper obtained by coating paper such as tissue paper with a white inorganic material such as titanium oxide, calcium carbonate, or calcium oxide can be mentioned.

The outer bag 1 is preferably waterproof, thereby forming an initial protective barrier to the protective cover 10 against rainfall and exposure to pesticides.

The outer bag 1 is preferably made of a material having a size degree of 20 seconds or more in the test of JIS P 8122 (1976), and can be formed of various materials. For example, it may be composed of a sheet or a non-woven fabric containing (typically composed of) a general-purpose plastic such as polyethylene, polyester, or polyurethane. Further, as a preferable example of the waterproof outer bag, a water-repellent material can be mentioned, and a material having R8 or more in the test specified in JIS P 8137 is preferable, and a material having R9 or more is more preferable. Examples of the water-repellent material include water-repellent paper in which a sheet-like base material made of various types of paper such as tissue paper is coated with silicon, wax, acrylic or the like, or impregnated with paraffin or the like. From the viewpoint of excellent breathability, water-repellent paper in which wax is coated on paper such as tissue paper is preferable.

The inner bag 2 may be one or two or more. When the protective cover 10 has one inner bag 2, it is preferably light-shielding. When the protective cover 10 has two or more inner bags 2, it is sufficient that the heat shield is achieved in the entire plurality of inner bags, but typically at least one inner bag is heat shield.
Further, as will be described later, when the space between the outer bag 1 and the inner bag 2 is used as a drainage route, it is preferable to use at least one of the corresponding surfaces of the outer bag and the inner bag in order to promote drainage. It is preferable that both are water repellent. On the other hand, it is rather preferable that the inner surface of the inner bag (at least the inner bag of the innermost layer in the case of being composed of a plurality of inner bags) 2 on which the pack formulation is held is a rough surface. Rough surfaces are easier for predatory natural enemy organisms to move, and predatory natural enemy organisms have a habit of preferring rough surfaces. Examples of such a rough surface include an exposed surface of the base paper without coating as described above.

Further, in order to effectively enhance the heat-shielding characteristics of the entire protective cover 10 by utilizing the multilayer structure, it is preferable that the outer bag 1 also has heat-shielding properties. In this case, as the material constituting the outer bag 1, for example, white paper obtained by coating paper such as tissue paper with a white inorganic material such as titanium oxide, calcium carbonate, or calcium oxide is further treated with water repellency as described above. White paper can be mentioned.

Since the protective cover 10 of the present invention has a multi-layer structure, the thickness of each bag is not particularly limited, but both the outer bag and the inner bag can have a thickness of, for example, 0.01 mm to 2.5 mm. Usually, the thickness is 0.04 mm to 0.5 mm. The outer bag and the inner bag can be weighed, for example, 20 g / m ² to 100 g / m ² , and are usually weighed 25 g / m ² to 50 g / m ² .

In such a structure in which a plurality of bags are stacked, for example, when the positional relationship between the inner bag 2 and the outer bag 1 is fixed, they may be mutually fixed by gluing 7, sewing or the like, if necessary. At this time, in order to effectively utilize the gap between the inner bag 2 and the outer bag 1, it is preferable that the inner bag 2 and a part of the outer bag 1 adhere to each other. Further, the adhesive portion 7 can partition the gap between the inner bag 2 and the outer bag 1 to form a desired drainage path.

When the inner bag 2 and the outer bag 1 form a multi-layer structure, a structure in which water or the like is less likely to be infiltrated into the inner bag 2 is preferable. As shown in 7 and 9, it is preferable that the entire inner bag 2 is covered with the outer bag 1. From the same point of view, it is preferable that the upper end 2a of the inner bag 2 is located at the lowest point 1c of the edge 1b that partitions the upper opening 1a of the outer bag 1 or below it. Further, as shown in FIGS. 12 and 13, the vicinity of the edge 2b that partitions the opening 2a of the inner bag 2 is folded inward with respect to the outer bag 1 to allow water or the like that has entered the cover to be absorbed into the outer bag 1. It is also preferable that the structure is such that the bag is guided to the gap between the inner bag 2 and the inner bag 2.

It is also important to make it possible for the water that has entered the outer bag 1 and the inner bag 2 to be discharged to the outside, and from this viewpoint, drainage ports 4 and 5 should be provided at the bottoms of the outer bag 1 and the inner bag 2. Is preferable.

Further, it is also desirable to have a structure in which water or the like that has entered the cover is guided to the drain port 4. For example, as shown in FIGS. 3 and 4, either or both of the left edge 2d and the right edge 2e of the inner bag 2 are located inside either or both of the left edge 1d and the right edge 1e of the outer bag 1. As a result, a path 6 through which water can pass is formed between the inner bag 2 and the outer bag 1, and water or the like can be guided to the drain port 4 through the path.

Further, as shown in FIGS. 5 and 6, either or both of the left edge 2d and the right edge 2e of the inner bag 2 are folded inward by a valley fold, whereby the inner bag 2 and the outer bag 1 are folded back. A path 6 through which water can pass is formed between the two, and water or the like can be guided to the drain port 4 through the path.

Further, as shown in FIGS. 7 and 8, the inner bag 2 is gather-folded (bellows-folded), thereby forming a large number of paths through which water or the like can pass between the inner bag 2 and the outer bag 1, and the paths thereof. Water or the like can be guided to the drain port 4 through the drain port 4. In this embodiment, there is an advantage that a large number of paths 6 through which water or the like can pass can be formed by surrounding the inner bag.

Further, as shown in FIGS. 9 to 11, the inner bag 2 or the outer bag 1 is provided with a convex portion by embossing or the like so that the convex portion is in contact with the other bag 1 when the multi-layer structure is formed, whereby the inner bag 2 is provided. A path through which water or the like can pass is formed between the outer bag 1 and the outer bag 1, and water or the like can be guided to the drain port 4 through the path. In this embodiment, various paths 6 that surround the inner bag and allow water or the like to pass through can be formed, and as shown in FIG. 11, the entire edge that partitions the opening of the inner bag 2 is covered with the outer bag. It is also possible to position the opening away from the partitioning edge.

In order to promote the passage of water or the like through the gap between the inner bag 2 and the outer bag 1 to promote the discharge to the outside of the bag, at least one of the outer surface of the inner bag 2 and the inner surface of the outer bag 1 is preferable. It is also preferable to make both water repellent by water repellent treatment or the like.

In the present invention, the various structures described above can form a path through which water can pass between the inner bag 2 and the outer bag 1, but the structure forming the path through which water can pass is described above. Is not limited to the embodiment of.
Further, when the above-mentioned space is provided between the inner bag and the outer bag, the heat insulating effect is enhanced by the air existing there, and the influence of the outside air temperature on the pest control pack formulation is suppressed.

The protective cover 10 of the present invention has various additional structures depending on the use of the packed preparation 3 to be contained therein, more specifically, the type of crop to be protected from pests, and the type of pests to be exterminated. It's okay. For example, when the protective cover 10 containing the pack formulation 2 is attached to a branch or the like to be protected and installed, a member for attaching or suspending to the branch or the like can be attached. Various shapes or structures of members for attaching or suspending to branches or the like are known, and appropriate members may be appropriately attached.

For example, as shown in FIGS. 1, 3, 5, 7 and 9, an arm 8 is attached to the protective cover 10, a branch or the like to be protected is passed through a notch between the arms, and both are in that state. It can be attached to a branch or the like to be protected by engaging by tying the arm portion or the like. Such an arm portion may be integrally formed as a part of the outer bag 1 as shown in FIG. 1 or the like in order to enhance the waterproof effect of the entire cover (suppressing the infiltration of water into the cover). preferable. In such a case, the arm portion 8 is formed of the material constituting the outer bag 1, but the arm portion may be reinforced with a wire 5 or the like as shown in FIG. As shown in FIG. 14, such a protective cover 10 can be attached to or suspended from an object by using a wire 5.

In addition, as shown in FIG. 15, a hanging portion 17 having a through hole 15 for passing the suspended portion of the object and a guide portion 16 for guiding the suspended portion of the object to the through hole 15. , A hook-shaped suspension 18 as shown in FIG. 16, a string 18 for connecting to a suspended portion of an object as shown in FIG. 17, or a mounting member made of a wire (not shown). However, it is not limited to these. In addition, when the pack formulation put in a protective cover such as strawberries is installed on the ground or wrapped around a tree like a fruit tree, as shown in FIGS. 18 and 19, the envelope is placed in the outer bag. A tongue piece such as an enclosed piece may be provided, and the tongue piece may be folded back at the time of installation so that the opening is closed from the external environment.

The pack preparation 3 is typically a preparation containing a predatory natural enemy organism and an ingredient for providing an environment in which the natural enemy organism can grow in the pack.
Examples of pests include thrips, whiteflies and spider mites. Examples of the predatory natural enemy organisms include Swarsky Kaburidani, Kukumerisukaburidani, Limonica skabridani and the like as predatory natural enemy organisms against horse mackerel and staghorn lizard, and Miyako as a predatory natural enemy organism against spider mites. Examples include Kaburidani, and Kukumerisukabridani and the like can be mentioned as predatory natural enemy organisms for horse mackerel.

In addition, as a component for providing an environment in which natural enemy organisms can proliferate, yeast, prey organisms, bran and the like can be mentioned. The prey organisms vary depending on the natural enemy organisms, and examples of the prey organisms such as Swarsky mosquito mite, Kukumerisukaburi mite, and Limonica scabrider mite include sugar mites, Sayaashinikuzani, etc. , Sayaashinikuzani, etc., and examples of prey organisms such as Miyakokaburidani include sugar mite, Sayaashinikuzani, and examples of prey organisms such as Kukumerisukaburidani include spinach, staghorn mite, staghorn mite, and sardine mite. Examples include prey mites such as Kenagakonadani and eggs of scaly insects.
Packs are typically made of non-woven fabric, paper cups, coffee filters, etc., with holes and gaps for natural enemy creatures to go out into the field.

Examples of pack formulations containing such predatory natural enemy organisms include pack formulations marketed under the trade names "Swarsky Plus" and "Spiral Plus" by Arista Life Science Co., Ltd., and Biobest Co., Ltd. overseas. Examples thereof include pack formulations sold under the trade names "swirskii breeding system" and "amblyseius breeding system". These pack formulations contain predatory natural enemy organisms such as fog mites, yeast, prey mites and bran in a pack made of a non-woven fabric of a predetermined size, and the pack is provided with a hole for releasing the natural enemy organism.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the technical scope of the present invention is not limited to these examples.

(Example 1)
As shown in FIG. 20, a rectangular inner bag having a length of 12 cm and a width of 11.5 cm is placed in an outer bag in which two arms are integrally extended at the upper end of a rectangle having a length of 18 cm and a width of 12 cm. , The edge of the opening of the inner bag is located at the lowest point of the V-shaped notch existing between the arms of the outer bag, and 3 points (2 points near the center of the upper part and 1 place near the bottom). A protective cover was created by gluing with and fixing the position of the inner bag. The outer bag was made of paraffin paper made by paraffinizing thin paper, and the inner bag was made of water-repellent white paper made of thin paper coated with titanium oxide to make it light-shielding (heat-shielding) and then water-repellent with wax. .. The outer bag and the inner bag are not provided with drainage ports for use in the test described later.

(Examples 2 to 6 and Comparative Examples 1 and 2)
A protective cover was prepared in the same manner as in Example 1 except that the outer bag and the inner bag were made of the materials shown in Table 2 below.

(Packed product)
In each of the following tests, the trade name "Swarsky Plus" or "Spiral Plus" (both commercially available by Arysta LifeScience Co., Ltd.) was used as a pack preparation containing natural enemy organisms.
In these products, a pack made of a non-woven fabric having a width of 60 mm and a length of 65 mm contains a fog mite, bran, and the like, and is provided with a hole through which the fog mite is released.

(Installation method)
In each of the following tests, as shown in FIG. 14, after the pack preparation 3 is placed in the protective cover, the wire 5 to which the arm portions 8 are attached is attached to each other with the wire passing through the notch portion between the arm portions 8. I used it and hung it on the wire.

(Evaluation test)
1. 1. Weather resistance test After inserting the pack product into each of the protective covers of Example 1 and Comparative Example 1, the pack product is hung on an outdoor track on a 40 mm rainy day, left outdoors for 24 hours, and then the bag containing the pack product ( The amount of water invading the inner bag in Example 1 and the outer bag in Comparative Example 1 and the degree of water absorption of each predatory fog-tick pack preparation were compared. The amount of water that has entered the bag containing the packed product is determined by measuring the weight of the bag containing the packed product before and after the test and determining the difference in weight. However, it was calculated from the difference in weight. The test results are shown in Table 1 below.

2. 2. Evaluation of internal temperature and humidity 1
(Differences in internal temperature and humidity due to differences in the materials of the outer bag and inner bag)
A pack formulation (spiral plus) and a button-type thermo-hygrometer (thermo manager, Hygrocron temperature-humidity logger, KN Laboratories) were placed in the protective covers of Comparative Example 2 and Examples 2, 3 and 7, and 160 cm above the ground in the greenhouse. The temperature inside the protective cover was measured for 30 days by suspending it from the wire installed in.
The number of days when the temperature inside the protective cover has risen to 35 ° C or higher, the number of days when the nighttime humidity inside the protective cover has been maintained at 80% or higher, and the number of days when the humidity has dropped to 40% or lower during the day are as follows. Shown together.

In the protective covers of Examples 2 and 3 in which the inner bag was made of white paper, there was no day when the internal temperature rose to 35 ° C. or higher. Further, even when the inner bag is made of black paper, the protective cover of Example 7 in which the outer bag is made of water-repellent white paper is compared with the protective cover of Comparative Example 2 in which the outer bag is made of paraffin paper. The number of days when the internal temperature rose to 35 ° C or higher decreased.
Regarding the humidity, in the protective covers of Example 2 and Comparative Example 2 in which the outer bag was made of paraffin paper, the day when the relative humidity inside at night was kept at 80% or more was 4 days. On the other hand, in the protective cover of Example 7 in which the outer bag was made of white water-repellent paper, the day when the relative humidity inside at night was kept at 80% or more was 12 days. Further, in the protective cover of Example 3 in which the inner bag was made of white paper, the number of days when the internal humidity at night was kept at 80% or more was 16 days.
Although not presented in the data, it is known that the water-repellent white paper has better breathability than the paraffin paper.

Further, in the protective cover of Comparative Example 2 in which the outer bag is made of paraffin paper and the inner bag is made of black paper, the number of days when the humidity inside the daytime is 40% or less is 28 days, and the bag is in a dry state. There were so many days. In the protective cover of Example 7 in which the outer bag was replaced with white water-repellent paper, the number of days when the humidity inside the daytime was 40% or less was 12 days, and although improvement was seen, the state was still dry. There were many days. On the other hand, in the protective covers of Examples 2 and 3 in which the inner bag was made of white paper, the number of days when the humidity inside was 40% or less was 0 days, and the effect of preventing the inside from drying was recognized.

3 Evaluation of internal humidity 2
(Difference in internal humidity due to difference in structure)
A pack formulation (spiral plus) and a button-type thermo-hygrometer (thermo manager, high-glocron temperature-humidity logger, KN laboratories) were placed in the protective covers of Examples 3 to 6, respectively, and the number line was installed 160 cm above the ground in the greenhouse. The humidity inside the protective cover was measured for 30 days. The table below shows the number of days that the nighttime humidity inside the protective cover is maintained at 80% or more.

In the protective covers of Examples 3 and 6 in which the outer bag is made of water-repellent white paper, the night humidity inside the protective cover is 80% or more as compared with the protective covers of Examples 4 and 5 in which the outer bag is made of water-repellent paper. The number of days I kept was increased. Further, in the protective covers of Examples 5 and 6 in which the left and right edges of the inner bag are folded back in a valley fold to form a relatively large space between the inner bag and the outer bag, such a space is not formed in Example 4. Compared with the protective cover of 3 and 3, the number of days when the nighttime humidity inside the protective cover was maintained at 80% or more increased.

4 Number of fog mites released As shown in Fig. 21, the protective cover containing the pack formulation (Swarsky Plus) is hung on a stand with a hanging part made of wire, and this is a plastic container with a mesh lid (5). It was put in .5L). The plastic container had a temperature of 22 ° C. and a humidity of 80%. As a control group, the pack preparation (Swarsky Plus) alone was set in the same manner.
The mites in the container were washed off with washing water (about 1% soapy water) every week and poured into a sieve of a 90 μm mesh lid. After removing the mesh lid and putting it in the freezer for a few minutes to suppress the activity of mites, it was counted under a microscope. The same test was repeated 3 times and the average value was taken as the number of mites. The total number of fog mites released in the test group and the control group is shown in Table 4 and FIG. 22 below.

With the pack preparation (Swarsky Plus) alone (control group), the average cumulative number of released animals after 6 weeks was 410, then there was almost no release of Kaburidani, and the average cumulative number of released animals after 8 weeks was 420. rice field.
On the other hand, in the protective cover (test group) containing the pack preparation (Swarsky Plus), the average cumulative number of Kaburidani released after 6 weeks was 408, which was almost the same as that in the target group. However, fog mites were released up to 8 weeks after further testing, and the average cumulative number released after 8 weeks was 584.
Therefore, it is expected that a cumulative total of more fog mites can be released over a longer period of time by putting the pack formulation in the protective cover.

5 Evaluation of rain resistance A pack preparation (commercially available product name: Swarsky Plus) was hung on an eggplant branch cultivated in an open field by covering it with a protective cover of Example 1. The pack formulation alone was suspended as a control group. In each of the test plot and the control plot, 15 packs or protective covers were hung per 30 m ² of the eggplant field. The residual rate was investigated 2 weeks, 4 weeks, 6 weeks, and 8 weeks from the date of suspension.

By covering with a protective cover, it was possible to prevent the pack formulation from falling in the field (outdoor cultivation).

As described above, the protective cover of the present invention protects the pest control product from the external environment such as rainfall, pesticide spraying, and feeding damage such as rats and worms, and the environment (temperature and / or humidity) in which the pest control product is installed. ) Can be maintained in a range suitable for natural enemy creatures. Further, the protective cover of the present invention has a low manufacturing cost and can be easily manufactured and installed.

1 Outer bag (outermost layer)
1a Upper opening 1b Edge 1c that divides the upper opening 1c Bottom point 1d Left edge 1e Right edge 2 Inner bag (inner layer)
2a Upper opening 2b Edge 2c that divides the upper opening 2c Upper end 2d Left edge 2e Right edge 3 Pack formulation 4 Drainage port 5 Drainage port 6 Gap between outer bag and inner bag (path through which water can pass)
7 Adhesive part (glued part)
8 Arm 9 Notch 10 Protective cover 15 Through hole 16 Guide 17 Suspended lower 18 String 19 Tongue piece 20 Line

Claims (9)

It is a protective cover for the pest control pack formulation containing natural enemy organisms.
It has a multi-layered structure composed of multiple bags, at least the outer bag is waterproof, and at least one bag is heat-shielding .
A protective cover in which the outer bag and the inner bag have a drainage port, and a path through which water can pass is formed between the inner bag and the outer bag . The protective cover according to claim 1, wherein at least one inner bag is heat-shielding. The protective cover according to claim 1 or 2, wherein the at least one inner bag is made of paper having a white coating on at least the outer surface. The protective cover according to any one of claims 1 to 3, wherein the outer bag is made of paper having a white coating on at least the outer surface and being water repellent. The protective cover according to claim 4, wherein the outer bag is further heat-shielding. The left and / or right ends of the inner bag are located inside the left and / or right ends of the outer bag, thereby forming a path through which water can pass between the inner bag and the outer bag. The protective cover according to any one of claims 1 to 5 . The left end and / or the right end of the inner bag is folded back by a valley fold, whereby a path through which water can pass is formed between the inner bag and the outer bag, claims 1 to 5. The protective cover according to any one of the above. The one according to any one of claims 1 to 5, wherein the inner bag is gather-folded to form a path through which water can pass between the outer surface of the inner bag and the inner surface of the outer bag. Protective cover. The protective cover according to any one of claims 1 to 8 , wherein the inner surface of the outer bag and / or the outer surface of the inner bag adjacent to the outer bag is water repellent.

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