JP7590754B2 - Pesticide applicator - Google Patents

Description

The present invention relates to a pesticide applicator that attracts pests and applies a specified pesticide to the attracted pests.

It has long been known that some insects are social. For example, hornets and termites live in colonies that form a hierarchy with a queen at the top. Insects with a social structure similar to the way humans live are called social insects. However, a group of social insects can essentially be said to be a family group, and there are some aspects that differ from human society.

Among the social insects mentioned above, there are hornets and the like that can become pests, and bait (poison bait) is known as one method of controlling social pests such as hornets. That is, by having adult hornets carry bait back to their nest, the bait is shared by other adults or larvae in the nest, resulting in the destruction of the entire nest. This type of bait contains edible ingredients that are eaten by the insects.

For example, Patent Document 1 discloses the use of animal protein as an ingestible component of bait for hornets. Patent Document 1 also describes that while honeybee larvae feed on plant proteins such as pollen, the larvae of harmful bees such as hornets feed on animal proteins such as caterpillars, and that by taking advantage of this difference and using animal protein as food, it is possible to create a selective pest control agent for use in beekeeping when dealing with harmful bees such as hornets.

Patent Document 2 also discloses the use of sucrose or fructose dissolved in water as another ingestible component of hornet bait.

JP 2008-63346 A Special Publication No. 9-512435

The bait in Patent Document 1 is not intended to be eaten by adult hornets, but is effective when carried into the nest by the adult hornets and then eaten by the larvae. As such, the bait in Patent Document 1 does not directly exterminate adult hornets, and is therefore not capable of quickly exterminating dangerous adult hornets, which require immediate extermination.

On the other hand, the ingested ingredient in Patent Document 2, sucrose, is the ingredient eaten by adult hornets. Therefore, if a bait contains sucrose as an ingested ingredient as in Patent Document 2, the adult hornets will take it back to their nest and then share it with other adults, which has the advantage of directly eliminating the adult hornets in the nest.

However, since hornet larvae mainly feed on animal protein, it is unlikely that the larvae will necessarily eat the bait described in Patent Document 2, which contains sucrose as its dietary ingredient, even if the adult hornet brings it back to its nest. In that case, the larvae will not necessarily eat it. In that case, the larvae will not be exterminated.

As such, conventional baits have not been able to reliably exterminate both the adults and larvae of social insects such as hornets. One of the reasons for this is thought to be the difficulty of creating a bait that is consumed by both adults and larvae.

The present invention was made in light of these points, and its purpose is to take advantage of the social nature of insects to achieve a sufficient extermination effect without the larvae having to eat them.

To achieve the above object, the first invention is characterized by having an attractant section that attracts pests, and a chemical attachment section that applies an insect growth inhibitor to the pests attracted to the attractant section.

According to this configuration, when a pest is attracted to the attractant, the insect growth inhibitor adheres to the pest by the agent attachment section. If the pest to which the insect growth inhibitor adheres is a larva, the molting and emergence of the larva is inhibited, leading to death. In addition, if the insect growth inhibitor adheres to an adult insect, the adult insect will, for example, return to the nest and come into contact with a larva, causing the insect growth inhibitor to adhere to the larva. As a result, even larvae that are not attracted to the attractant will die.

The second invention is characterized in that the attractant part has an effect of attracting adult social insects.

In other words, since insect growth inhibitors are chemicals that are ineffective against adult insects, applying them to adult insects has little to no extermination effect. However, by attracting social insects as in this configuration, the insect growth inhibitor can be applied to the body surface of the adult insects, who then bring the insects back to their nests. When the adult insects take care of the larvae, the insect growth inhibitor can then be applied to the larvae. This will cause the larvae in the nest to die.

The third invention is characterized in that the attractant contains an edible component that is consumed by pests.

With this configuration, the attractant section contains an edible component, so the pest insects can eat the edible component while the insect growth inhibitor is attached to the pest insects by the drug attachment section.

The fourth invention is characterized in that the ingestible ingredient contains at least sugar.

With this configuration, dangerous pests such as hornets can be made to ingest the edible components, so that the insect growth inhibitor can be attached to the hornets.

The fifth invention is characterized in that the attractant contains a slow-acting insecticidal component, and the insecticidal component and the ingestible component are mixed together.

In other words, when adult insects eat the edible ingredient, they also eat the insecticidal ingredient because the edible ingredient contains a slow-acting insecticidal ingredient mixed in. If the insecticidal ingredient eaten by an adult insect is shared with other adult insects in the nest, the adults in the nest can be exterminated. On the other hand, as mentioned above, the insect growth inhibitor attached to the adult insects can prevent the larvae in the nest from emerging, causing them to die. Therefore, the entire nest can be destroyed.

The sixth invention is characterized in that the drug attachment portion is composed of an impregnated body impregnated with an insect growth inhibitor, and the impregnated body is exposed to the outside of the pest drug attachment apparatus.

This configuration makes it easier for pests to come into contact with the impregnated body, and the insect growth inhibitor can be attached to the pests simply by the pests coming into contact with the impregnated body.

The seventh invention is characterized in that the attractant has a liquid-absorbing material that sucks in liquid ingestible components consumed by pests, the liquid-absorbing material is exposed to the outside of the pesticide applicator, and the impregnated body is arranged around the part of the liquid-absorbing material that is exposed to the outside of the pesticide applicator.

With this configuration, when pests consume the ingestible components sucked up by the liquid-absorbing material, the impregnated body is arranged around the liquid-absorbing material, making it easier for the pests to come into contact with the impregnated body. This increases the probability that the insect growth inhibitor will adhere to the pests, further improving the pest extermination effect.

The eighth invention is characterized in that the impregnated body is formed to surround the portion of the pesticide applicator in the liquid-absorbing material that is exposed to the outside.

With this configuration, the impregnated body is positioned to surround the liquid-absorbing material, further increasing the probability that the insect growth inhibitor will adhere to pest insects.

According to the present invention, an insect growth inhibitor can be attached to attracted pests, so a sufficient extermination effect can be obtained without having the larvae eat food that contains an insecticidal component.

1 is a perspective view of a pest control device according to an embodiment of the present invention, seen from above. FIG. 2 is a vertical cross-sectional view of the pest control device. FIG. 2 is an exploded view of the pest control device. FIG. FIG. 2 is a diagram showing components of a pest control kit.

The following describes in detail an embodiment of the present invention with reference to the drawings. Note that the following description of the preferred embodiment is essentially merely an example and is not intended to limit the present invention, its applications, or its uses.

Figure 1 is a perspective view of a pest control device 1 according to an embodiment of the present invention. As also shown in Figures 2 and 3, the pest control device 1 includes a pest bait A (shown in Figure 2), a container 2 in which the pest bait A is stored, and a hood 4.

Pest bait A is a liquid that contains an insecticidal component, an edible component, and a repellent component for beneficial insects. As the insecticidal component, an insecticide that does not adversely affect the eating habits of pests (is not repellent to pests) can be used. Furthermore, a slow-acting insecticide is preferable. A slow-acting insecticide is an insecticide that does not immediately knock down or die when it comes into contact with or is eaten by a pest, but remains active for a certain period of time after contact or ingestion, but dies after the certain period of time has passed.

The above-mentioned predetermined time is the time during which the pest insect can return to its nest after coming into contact with or ingesting the insecticide, and preferably includes the time during which the pest insect can take care of its larvae or come into contact with other adults after returning to its nest. For example, when the target pest insect is a wasp, the above-mentioned predetermined time is about several tens of minutes to several hours. Similarly, when the target pest insect is a cockroach, the above-mentioned predetermined time is about several tens of minutes to several hours. Note that this predetermined time can be adjusted to some extent by the concentration of the insecticidal component mixed into the pest bait A. That is, if you want to kill the pest insects that have returned to their nests relatively quickly, you can set the concentration of the insecticidal component high, and if you want the pest insects that have returned to their nests to be active for a relatively long time, you can set the concentration of the insecticidal component low. In addition, the concentration of the insecticidal component can be set appropriately depending on the type of pest insect to be targeted, the usage scene, etc.

Examples of insecticides that have no adverse effect on eating and are slow-acting include, but are not limited to, phenylpyrazole insecticides such as fipronil, carbamate insecticides such as carbaryl and propoxur, neonicotinoid insecticides such as dinotefuran, clothianidin and imidacloprid, and boric acid. Of these, fipronil is preferred.

The target pests to be exterminated by the pest extermination device 1 are, for example, social pests such as wasps and cockroaches, but other pests that are social and harm humans can also be the target pests. Therefore, it is sufficient if the pesticide contains an insecticide that has a slow-acting insecticidal effect against these target pests as the insecticidal component. The insecticidal component can contain one or more slow-acting insecticides. When two or more slow-acting insecticides are contained, they can be mixed and used. Note that social pests are pests that form groups and live in a hierarchy within the group. Among such pests, there are some in which the adults take care of the larvae and the adults come into contact with each other.

The edible components are composed of components that are consumed by pests, and edible components containing at least sugars can be used. For example, any one of monosaccharides, disaccharides, and polysaccharides can be used as an edible component, or any two or more can be mixed and used as an edible component. Examples of monosaccharides that can be used as edible components include glucose, fructose, and galactose. Examples of disaccharides that can be used as edible components include sucrose, maltose, and lactose. Examples of polysaccharides that can be used as edible components include substances in which a large number of monosaccharide molecules are polymerized through glycosidic bonds, such as starch.

The repellent ingredient for beneficial insects may be any ingredient that repels beneficial insects but not harmful insects, and an example of such an ingredient is ethanol. By including ethanol as a repellent ingredient for beneficial insects, it has a repellent effect on beneficial insects such as honeybees, but has almost no repellent effect on harmful insects such as hornets, and instead ethanol has an attractive effect on hornets.

Pest bait A can be obtained by mixing an insecticidal component, an edible component, and a repellent component for beneficial insects. Pest bait A may contain, for example, water (ion-exchanged water). Pest bait A may also contain, for example, any one or any two or more of polyethylene glycol, a surfactant, acetic acid, lactic acid, sodium propionate, etc.

As an example of pest bait A, when pest bait A is 100 g, the insecticidal component fipronil is 0.003 g to 0.010 g, polyethylene glycol is 0.05 g to 0.10 g, surfactant (Tween 20) is 0.1 g to 0.5 g, fructose glucose liquid sugar is 10 g to 25 g, acetic acid is 0.03 g to 0.10 g, lactic acid is 0.03 g to 0.10 g, sodium propionate is 0.50 g to 0.15 g, and the remainder is ion-exchanged water. Polyethylene glycol and surfactant may be omitted. Acetic acid and lactic acid are added to improve the attraction to hornets, but may be omitted.

Ethanol, a repellent ingredient for beneficial insects, is produced in pest bait A by fermenting the sugars contained in pest bait A, so it is not listed as a blending amount in the above examples. For example, by mixing dry yeast into pest bait A according to the above examples, alcohol fermentation proceeds within pest bait A, and sugar is broken down to produce ethanol and carbon dioxide. This produces pest bait A containing ethanol. The ethanol produced in this process constitutes the repellent ingredient for beneficial insects.

In other words, before pest bait A is used, pest bait A does not need to contain ethanol. This ethanol-free pest bait A can also be called an initial bait or an alcohol-free bait. For example, by adding dry yeast to ethanol-free pest bait A at the start of use, it will become ethanol-containing pest bait A. Since alcohol fermentation continues as long as sugar remains, pest bait A can contain ethanol for a long period of time after use begins. Note that yeast exists in nature, and fermentation can occur naturally without the addition of dry yeast, so the addition of dry yeast is not essential.

Also, ethanol may be added to pest bait A in advance without carrying out alcoholic fermentation.Also, ethanol may be added to pest bait A in advance, and then alcoholic fermentation may be carried out.

The concentration of the repellent component for beneficial insects can be 5% by mass or more of pest bait A. By making the concentration of the repellent component for beneficial insects 5% by mass or more of pest bait A, the repellent effect on honeybees in particular can be enhanced. The honeybee repellent test is described below.

(Honeybee repellent test)
A transparent glass ring 10 cm in diameter and 20 cm in length was prepared, a wire mesh that honeybees could not pass through was attached to one end of the glass ring, and 2 cm x 4 cm absorbent cotton was placed on the inside of the glass ring on the wire mesh. The absorbent cotton was prepared by soaking a sufficient amount (about 2 g) of each of the following test agents. After placing one honeybee in the glass ring, the other end of the glass ring was closed with a transparent lid. After closing the other end of the glass ring with the lid, observation was made for one hour, and the time and number of times that the honeybee in the glass ring ate from the absorbent cotton were measured.

The test substances are as follows:

First test agent: sugar water Second test agent: sugar water containing 2.5% by mass of ethanol Third test agent: sugar water containing 5% by mass of ethanol Fourth test agent: sugar water containing 10% by mass of ethanol Fifth test agent: sugar water containing 15% by mass of ethanol Sixth test agent: sugar water containing 0.06% by mass of lactic acid Seventh test agent: sugar water containing 0.06% by mass of acetic acid

The test results are shown in Table 2. Table 2 shows the average eating time and the average number of times eating, and lists the average values of the results of two repeated tests. The average eating time indicates how many seconds an eating action took per hour. The average number of times an eating action took place per hour.

For the first test product, which was sugar water containing no ethanol, the average eating time was 37 seconds and the average number of times eaten was 9 times, whereas for the second test product, which was sugar water with 2.5% ethanol by mass, the average eating time was 27.5 seconds and the average number of times eaten was 7.5 times, a significant decrease in both time and number of times. In particular, for the third test product, which was sugar water with 5% ethanol by mass, the average eating time was 7 seconds and the average number of times eaten was 0.5 times, showing an extremely high repellent effect against honeybees.

(Hornet attraction test)
Next, the hornet attraction test will be described. This attraction test was carried out in a place near a forest in Hatsukaichi City, Hiroshima Prefecture. The test agent is the pest bait A described as the above-mentioned embodiment. When the pest bait A is 100g, the insecticidal component fipronil is 0.003g to 0.010g, polyethylene glycol is 0.05g to 0.10g, surfactant (Tween 20) is 0.1g to 0.5g, fructose glucose liquid sugar is 10g to 25g, acetic acid is 0.03g to 0.10g, lactic acid is 0.03g to 0.10g, sodium propionate is 0.50g to 0.15g, and the remainder is ion-exchanged water.

An appropriate amount of dry yeast was added to this insect pest bait A to allow alcohol fermentation to proceed, and tests were conducted in the state in which ethanol was produced. The ethanol concentration in this insect pest bait A is not necessarily constant, as it is determined by the balance between the rate at which fermentation proceeds and the rate at which the ethanol evaporates, but in normal usage conditions (outdoor temperatures during the season when hornets build nests), it reaches 10% by mass or more at the peak of fermentation, and thereafter maintains a concentration of at least 5% by mass or more for a long period of time until the sugars are consumed by fermentation. In other words, the ethanol concentration that provides a repellent effect on honeybees is maintained for a long period of time.

Several examples within the above range were prepared, and attraction tests were conducted multiple times for each. Each test lasted for 3 hours.

The test results showed that the hornets visited the facility an average of 4.5 times (over three hours) and spent an average of four minutes and 44 seconds eating each time. In other words, even when the ethanol concentration was 5% by mass or more, the hornets were not repelled by it, but rather were attracted to it and even willingly consumed it.

(Configuration of container 2)
Next, the configuration of the container 2 will be described. As shown in FIG. 4, the container 2 includes a cup-shaped member 20, a lid member 21, a liquid-absorbent material 22, and an impregnated body 23. The cup-shaped member 20 is made of a resin member that opens upward, and has a cylindrical shape with a bottom. The horizontal cross section of the cup-shaped member 20 becomes larger toward the top. The pest bait A is stored inside the cup-shaped member 20. The lid member 21 is made of a resin member that is formed so that it can cover the open part of the cup-shaped member 20 from above. The lid member 21 and the cup-shaped member 20 can be integrated by fitting the lid member 21 to the upper part of the cup-shaped member 20.

The outer peripheral edge of the lid member 21 is approximately circular. The portion of the lid member 21 located radially outward from the top of the cup-shaped member 20 is composed of an inclined surface portion 21a that is positioned lower as it approaches the outer peripheral edge. The inclined surface portion 21a is annular in plan view and is continuous in the circumferential direction. This inclined surface portion 21a may be formed with, for example, a stepped step portion, an embossed pattern, etc. The inclined surface portion 21a may be omitted or may be a horizontal surface portion.

As shown in Figures 2 and 4, a recessed portion 21b is formed on the cover member 21 inside the inclined surface portion 21a. The recessed portion 21b has an annular shape in a plan view and is continuous in the circumferential direction. The recessed portion 21b can also be called an annular groove. A through hole 21c that penetrates the cover member 21 in the vertical direction is formed in the center of the cover member 21. The through hole 21c can be approximately circular, but may also be polygonal.

Furthermore, a vertical wall portion 21d is formed in the center of the lid member 21, extending in both vertical and horizontal directions from the periphery of the through-hole 21c. The vertical wall portion 21d extending upward from the periphery of the through-hole 21c separates the inside of the recessed portion 21b from the inside of the through-hole 21c. The vertical wall portion 21d extending downward from the periphery of the through-hole 21c has a predetermined length, and also serves to position the liquid-absorbent material 22, which will be described later.

The liquid-absorbent material 22 is made by forming fibers into a columnar shape, and is configured to be able to suck up and absorb liquid by capillary action. In this embodiment, the liquid-absorbent material 22 is cylindrical, but is not limited to this, and may be plate-shaped or may be a columnar shape with a polygonal horizontal cross section. The liquid-absorbent material 22 can also be called a liquid-absorbent core. The lower end of the liquid-absorbent material 22 reaches near the bottom of the cup-shaped member 20 and is located in the pest bait A contained in the cup-shaped member 20. On the other hand, the upper end of the liquid-absorbent material 22 protrudes upward from the vertical wall portion 21d, and at least the upper end surface 22a of the liquid-absorbent material 22 is exposed to the outside of the pest drug applicator 1. In addition, the vertical middle part of the liquid-absorbent material 22 is held by the vertical wall portion 21d in a state where it is inserted into the through hole 21c so as not to fall. The upper end of the liquid-absorbent material 22 does not have to protrude upward from the vertical wall portion 21d, and may be located at the same height as the upper end of the vertical wall portion 21d.

The liquid-absorbing material 22 is an attractant that attracts pests. In other words, the liquid-absorbing material 22 is a member that sucks in the pest bait A and transports it to the upper end surface 22a by capillary action, so it contains edible ingredients as well as ethanol, and as described above, has an attractant effect on hornets, which are social insects. The liquid-absorbing material 22 and the pest bait A can form the attractant.

In addition, since the liquid-absorbing material 22 is what sucks up the pest bait A, the liquid-absorbing material 22 is also a part that contains a delayed-acting insecticidal component. In addition, since the liquid-absorbing material 22 is the part that evaporates the repellent component into the air, it is also an evaporation part. Note that a member that is impregnated with ethanol may be provided separately from the liquid-absorbing material 22 and used as the evaporation part.

The impregnated body 23 is impregnated with an insect growth regulator. An insect growth regulator (IGR) is an insecticide that disrupts the balance of hormones related to insect metamorphosis and molting, thereby inhibiting the molting and emergence of insects, and as a result, causing the death of the insects. Examples of insect growth regulators that can be used in this embodiment include etoxazole, pyriproxyfen, methoprene, hydroprene, diflubenzuron, etc. Among these, etoxazole is preferred when bees are to be exterminated.

The impregnated body 23 is a member that constitutes the drug attachment section that attaches an insect growth inhibitor to pests attracted to the liquid-absorbing material 22, which is the attractant section. Since the pest control device 1 is equipped with the impregnated body 23, it can also be said to be a pest drug attachment device that can attach an insect growth inhibitor to pests. The impregnated body 23 can also be impregnated with a solution in which an insect growth inhibitor is dissolved in a solvent. The impregnated body 23 may also be impregnated with a liquid other than the insect growth inhibitor. The amount of insect growth inhibitor impregnated into the impregnated body 23 is not particularly limited, but can be set to an amount that will last, for example, for more than one month when the pest control device 1 is installed outdoors.

The impregnated body 23 can be made of, for example, a material formed from fibers similar to those of the liquid-absorbing material 22, and has a circular ring shape that fits into the recessed portion 21b of the lid member 21. The impregnated body 23 is held by the lid member 21 while fitted into the recessed portion 21b, and in this state, at least the upper surface is exposed to the outside of the pesticide applicator 1. The impregnated body 23 is positioned horizontally relative to the lid member 21, and is supported from below by the bottom surface of the recessed portion 21b, so that it cannot be displaced further downward in the height direction.

The impregnated body 23 fitted in the recessed portion 21b is arranged around the portion (upper end surface 22a) of the liquid-absorbing material 22 that is exposed to the outside of the pesticide applicator 1. More specifically, the impregnated body 23 is formed in a ring shape so as to surround the portion of the liquid-absorbing material 22 that is exposed to the outside of the pesticide applicator 1. In addition, the impregnated body 23 and the upper part of the liquid-absorbing material 22 are close to each other. For example, when an adult hornet touches its mouth to the upper part of the liquid-absorbing material 22 by eating, the distance between the impregnated body 23 and the liquid-absorbing material 22 is set so that its legs and hands come into contact with the upper surface of the impregnated body 23. Therefore, when a pest attracted by the liquid-absorbing material 22 lands on the container 2 to eat the ingestible components of the liquid-absorbing material 22, the legs, hands, torso, etc. of the pest are more likely to come into contact with the impregnated body 23, and the possibility of contact can be increased. This allows the insect growth inhibitor to adhere to the pests attracted to the liquid-absorbing material 22. The impregnated body 23 does not have to be annular, and may be provided intermittently in the circumferential direction of the upper end surface 22a of the liquid-absorbing material 22, for example. The impregnated body 23 and the liquid-absorbing material 22 may be provided side by side in the horizontal direction. The upper surface of the impregnated body 23 may be lower than the upper end surface 22a of the liquid-absorbing material 22, or the upper surface of the impregnated body 23 may be higher than the upper end surface 22a of the liquid-absorbing material 22.

(Configuration of Hood 4)
The hood 4 can be provided as necessary. Examples of materials for the hood 4 include a resin film or sheet material and water-resistant paper. The hood 4 is formed in an annular shape, and an insertion hole 4a into which the cup-shaped member 20 can be inserted is formed in the lower portion thereof so as to penetrate in the vertical direction. As shown in FIG. 2, the diameter of the insertion hole 4a is set to be larger than the outer diameter of the lower portion of the cup-shaped member 20 and smaller than the outer diameter of the upper portion, so that the cup-shaped member 20 can be held by the hood 4 in a state where it is inserted into the insertion hole 4a.

The upper side of the hood 4 is located directly above the lid member 21, forming a space between the hood 4 and the lid member 21 into which pests can enter. This space is open horizontally, allowing attracted pests to easily enter. The upper side of the hood 4 can cover the liquid-absorbent material 22 and the impregnated body 23, preventing rain and other elements from getting on the liquid-absorbent material 22 and the impregnated body 23 when the device is installed outdoors.

The hood 4 has a hanging portion 4b that protrudes upward for hanging the pest control device 1. A thread or wire can be passed through this hanging portion 4b, allowing the pest control device 1 to be hung from a tree branch or pole.

(Pest control kit)
5 shows a pest control kit 100. The pest control kit 100 includes a pest bait A contained in a bag 101 and sealed, a container 2, a food 4, and dry yeast contained in a bag 102 and sealed. The bags 101, 102, the container 2, and the food 4 can be contained in one packaging box (not shown).

When in use, the lid member 21 of the container 2 is opened, and the pest bait A is transferred from the bag 101 to the cup-shaped member 20, and the dry yeast is also transferred from the bag 102 to the cup-shaped member 20. This initiates alcohol fermentation and produces ethanol. The lid member 21 is then closed, and the liquid-absorbing material 22 is immersed in the pest bait A.

The configuration of the pest control kit 100 is not limited to this, and for example, the pest bait A may be stored in the container 2 in advance, and the top surface of the lid member 21 may be sealed by blocking it with a film (not shown) or the like. This allows the bag 101 of the pest bait A to be omitted. In this case, when using, the film is peeled off to expose the through hole 21c of the lid member 21, and the dry yeast is transferred into the container 20 through the through hole 21c, and then the liquid absorbing material 22 is inserted into the through hole 21.

The impregnated body 23 can be sealed in the recessed portion 21b until use begins. For example, by sealing the recessed portion 21b with a film (not shown), the impregnated body 23 can be stored without being exposed to the outside air. When use begins, the film can be peeled off to expose the impregnated body 23.

(Pest control methods)
Next, a pest control method using the pest control device 1 configured as above will be described. The pest control device 1 containing the pest bait A in the container 2 is installed outdoors. The installation location is not particularly limited, and may be a forest or a residential area. The pest control device 1 may be installed by hanging, or may be installed on a stand, desk, or the ground. The pest control device 1 continues to produce ethanol by alcohol fermentation, so that the ethanol concentration in the pest bait A can be maintained at a predetermined level or higher.

When the pest control device 1 is installed, pests are attracted by the liquid-absorbing material 22. At this time, as described above, pests are also attracted by the ethanol, so the effect of attracting pests can be enhanced. On the other hand, honeybees are repelled by ethanol, so honeybees, which are beneficial insects, are hardly attracted.

The sugars contained in pest bait A are ingested by adult hornets, so when adult hornets are attracted, for example, they have good ingestion properties. When the attracted adult hornets ingest pest bait A, the insecticidal component is taken up into the adult's body. By using a slow-acting insecticide as the insecticidal component, the adult hornets do not die instantly and are able to return to their nest.

On the other hand, when the adult hornet touches its mouth to the top of the liquid-absorbing material 22 while eating, its legs and hands come into contact with the top surface of the impregnated body 23, causing the insect growth inhibitor to adhere to its body. Therefore, the adult hornet returns to its nest with the insect growth inhibitor still attached to its body.

It is thought that adult hornets that return to the nest share the pest bait A that they have eaten with other adults in the nest. Because pest bait A contains a slow-acting insecticide, the other adults in the nest also ingest the slow-acting insecticide into their bodies.

On the other hand, hornet larvae feed mainly on animal protein. Because pest bait A does not contain animal protein, it is unlikely that the adult hornets that returned to their nest would share pest bait A with the larvae in the nest. However, the adult hornets have an insect growth inhibitor attached to their bodies. As the adult hornets take care of the larvae, the insect growth inhibitor adheres to the larvae's bodies. This prevents the larvae from hatching normally, and ultimately leads to their death. Therefore, the insect growth inhibitor in this extermination method can be said to be an insecticidal component for larvae.

And because the adult hornet mentioned above has consumed the slow-acting insecticide, it will eventually die. The same goes for other adult insects in the nest who have been given the pest bite agent A by the adult hornet. Therefore, it can be said that the slow-acting insecticide in this extermination method is an insecticidal ingredient for adult insects.

In this way, the pest control method of this embodiment makes it possible to exterminate the entire hornet nest.

Even if the attracted pest is not a hornet, the sugars contained in the pest bait A are preferred ingestible components by many pests, so they have good ingestibility, and will ingest the insecticidal components along with the ingestible components. This ensures good extermination effects against pests larger than hornets. Furthermore, if the pest takes some of the pest bait A back to its nest and feeds it to other pests, it will also be effective in exterminating the nest.

Furthermore, even if a pest other than a wasp is attracted to the liquid-absorbing material 22, since the impregnated body 23 is placed nearby, it is easy for the pest to come into contact with the impregnated body 23, and the insect growth inhibitor impregnated in the impregnated body 23 adheres to the pest. If the pest to which the insect growth inhibitor adheres is a larva, the molting and emergence of the larvae is inhibited, leading to death. In addition, if the insect growth inhibitor adheres to an adult insect, the adult insect will, for example, return to the nest and come into contact with a larva, causing the insect growth inhibitor to adhere to the larva. As a result, even larvae that are not attracted to the attractant will die.

(Effects of the embodiment)
As described above, according to this embodiment, since the composition contains edible components including sugars and repellent components that repel beneficial insects, it is possible to quickly eliminate particularly social pest insects while minimizing the adverse effects on beneficial insects.

In addition, since an insect growth inhibitor can be applied to the attracted pests, sufficient extermination effects can be achieved without having the larvae eat food that contains insecticidal ingredients.

The above-described embodiments are merely illustrative in all respects and should not be interpreted as limiting. Furthermore, all modifications and variations within the scope of the claims are within the scope of the present invention.

As explained above, the present invention can be used to exterminate pests such as wasps.

1. Pest control device (pesticide applicator)
2 Container 22 Liquid-absorbing material 23 Impregnated body 100 Pest control kit A Pest bait agent

Claims (4)

An attractant for attracting hornets;
A pesticide applicator comprising a drug application part that is provided separately from the attractant part and applies an insect growth inhibitor to the body surface of the hornet attracted to the attractant part,
The drug adhesion portion is composed of an impregnated body impregnated with the insect growth inhibitor,
The impregnated body is exposed to the outside of the pesticide applicator,
The attractant portion has a liquid-absorbing material that sucks up the liquid component eaten by the hornet,
The liquid-absorbing material is exposed to the outside of the pesticide applicator,
The impregnated body is disposed around a portion of the liquid-absorbent material that is exposed to the outside of the pesticide applicator,
A pesticide applicator, characterized in that an upper surface of the liquid-absorbing material is higher than an upper surface of the impregnated body . The pesticide applicator according to claim 1 ,
A pesticide applicator, wherein the ingestible component contains at least a sugar. The pesticide applicator according to claim 2 ,
The attractant contains a slow-acting insecticidal component,
A pesticide applicator according to claim 1, wherein the insecticidal component and the edible component are mixed together. The pesticide applicator according to claim 1 ,
A pesticide applicator, characterized in that the impregnated body is formed so as to surround a portion of the liquid-absorbent material that is exposed to the outside of the pesticide applicator.

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