JP7317174B2 - Centipede control poison bait - Google Patents

Description

The present invention relates to a poison bait for controlling myriapod pests.

Centipedes such as the blue-bellied centipede, the blue centipede, and the red centipede live in outdoor environments and prey on small insects and the like using jaw limbs with poisonous glands. However, since centipedes have a habit of preferring warm environments, they often invade homes and the like, and may cause bite damage when coming into contact with people in homes and the like. Therefore, poison baits are used to control myriapod pests such as centipedes.

For example, there is a pest control bait containing trimethylglycine (see, for example, Patent Document 1). The insect pest control bait of Patent Document 1 prevents drying and deterioration by moisturizing with trimethylglycine, and maintains its efficacy for a long period of time even when installed outdoors.

There is also a pest control bait composition containing a superabsorbent polymer (see, for example, Patent Document 2). The pest control bait composition of Patent Document 2 absorbs soil moisture and the like with the superabsorbent polymer and retains moisture for a long period of time even under dry conditions, thereby improving attraction and feeding. be.

Japanese Patent Application Laid-Open No. 2001-181106 JP-A-57-62201

The attraction and feeding properties of poisonous bait agents for pest control differ in the manifestation of their efficacy depending on the type of pest. However, the pest control bait composition of Patent Document 1 is intended to control mainly ants and cockroaches, and the pest control bait composition of Patent Document 2 is intended to control soil pests that damage crops. None of them are optimized for controlling myriapod pests. Therefore, the poison bait agents of Patent Documents 1 and 2 do not necessarily exhibit a high control effect against myriapod pests.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a poison bait for controlling myriapod pests, which can exhibit a high control effect against myriapod pests such as centipedes. .

The characteristic configuration of the poison bait for controlling myriapod pests according to the present invention for solving the above problems is as follows:
A poison bait for controlling myriapod pests,
It contains pest-controlling ingredients, sugars that promote feeding, food flavors that attract ingredients, polyhydric alcohols that are moisturizing ingredients, and a chemical solution containing water.

According to the poison bait for controlling myriapod pests of this configuration, the medicinal solution contains saccharides as an ingestion promoting ingredient, food flavoring as an attractant ingredient, polyhydric alcohol as a moisturizing ingredient, and water. It exhibits excellent attractability and feeding properties for quasi-pests, and furthermore, by containing an insect-controlling component in the chemical solution, it is possible to exhibit an excellent insecticidal effect against ingested myriapod pests. As a result, it is possible to achieve a high control effect against myriapod pests such as centipedes.

In the poison bait for controlling myriapod pests according to the present invention,
The food flavor comprises fresh milk oil, strawberry essence, acetoin, mango essence, bonito/tuna extract, camembert cheese flavor, apple oil, salted bonito extract, tuna extract, banana essence, nori flavor, squid paste, and maple essence. It is preferably at least one selected from the group.

According to the poison bait for controlling myriapod pests of the present configuration, by containing the above-mentioned food flavoring, it is possible to exhibit excellent attraction to myriapod pests, especially centipedes, and to feed them, so that centipedes can be fed. It is possible to achieve a high control effect against

In the poison bait for controlling myriapod pests according to the present invention,
The liquid medicine is preferably gelled with a gelling agent.

According to the poison bait for controlling myriapod pests of this configuration, since the chemical solution is gelled with the gelling agent, it becomes easy to handle, and furthermore, it does not dry out for a long period of time, and the myriapod pests can be can be controlled.

In the poison bait for controlling myriapod pests according to the present invention,
The drug solution and the gelling agent are preferably mixed at a weight ratio of 20:1 to 70:1.

According to the poison bait for controlling myriapod pests of this configuration, by adjusting the compounding ratio of the chemical liquid and the gelling agent within the above range, the bait has a hardness and a moisture content that are easy for myriapod pests to eat. An agent can be obtained, and a high control effect against myriapod pests can be exhibited.

In the poison bait for controlling myriapod pests according to the present invention,
The content of saccharides in the drug solution is preferably 10 to 70% by weight.

According to the poison bait for controlling myriapod pests of this configuration, by adjusting the sugar content in the chemical liquid to the above range, it does not crystallize even at low temperatures, and exhibits excellent feeding properties against myriapod pests. can do.

In the poison bait for controlling myriapod pests according to the present invention,
The gelling agent is preferably at least one selected from the group consisting of water absorbent resin, xanthan gum, carrageenan, locust bean gum, and agar.

According to the poison bait for controlling myriapod insect pests of this configuration, the gelatinizer is the above-mentioned substance, so that it is possible to prepare a gel-like poison bait that is easy to use. Since the gel-like poison bait is excellent in feeding properties to myriapod pests, particularly centipedes, it can exhibit a high control effect on myriapod pests.

In the poison bait for controlling myriapod pests according to the present invention,
It preferably contains no surfactant.

According to the poison bait for controlling myriapod pests of this configuration, since it does not contain a surfactant, it has excellent feeding properties against myriapod pests, particularly centipedes, and can exhibit a high control effect.

FIG. 1 is a graph showing the average number of times of exposure of Tobismukade to food flavors.

The poison bait for controlling myriapod insect pests according to the present invention contains a pest control component, a sugar as an ingestion promoting component, a food flavor as an attracting component, a polyhydric alcohol as a moisturizing component, and a chemical solution containing water. Hereinafter, embodiments of the poison bait for controlling myriapod pests of the present invention will be described. However, the present invention is not intended to be limited to the embodiments described below or the configurations described in the drawings.

<Chemical solution>
[Insect Control Ingredients]
The pest control component, which is one of the main components of the liquid medicine, is an effective component for exterminating myriapod pests such as centipedes and millipedes. Such components include neonicotinoid insecticides and carbamate insecticides, and neonicotinoid insecticides are particularly preferred. Neonicotinoid insecticides include, for example, dinotefuran, acetamiprid, imidacloprid, clothianidin, thiacloprid, thiamethoxam, and nitenpyram, with dinotefuran being particularly preferred. Dinotefuran has optical isomers and geometric isomers based on an asymmetric carbon, and these are also included in pest control ingredients. Carbamate insecticides include propoxur, carbaryl, methomyl, and thiodicarb, and propoxur is particularly preferred. These neonicotinoid insecticides and carbamate insecticides may be used alone or in combination. The content of the pest control component in the chemical solution is preferably 0.1 to 1.0% by weight. Within such a range, for example, even in a state in which the chemical solution is impregnated with the gelling agent, the effect of the pest control component can be exhibited. If the content of the pest-controlling component in the liquid chemical is less than 0.1% by weight, the pest-controlling component will be insufficient and the insecticidal effect will be insufficient. On the other hand, if the content of the pest-controlling component in the liquid chemical exceeds 1.0% by weight, the concentration of the pest-controlling component increases, making it difficult to properly prepare the liquid chemical.

[Food promoting ingredient]
Saccharides are used as an ingestion-promoting component, which is one of the main components of the drug solution. Examples of sugars include monosaccharides such as glucose and fructose, disaccharides such as sucrose, maltose, and trehalose, and refined sugars such as soft sugar, granulated sugar, and white sugar. preferable. These saccharides may be used alone, or may be used in combination. In addition to saccharides, sugar alcohols such as sorbitol and xylitol, and other sweeteners can be blended as food intake promoting ingredients. The content of the food intake promoting component in the drug solution is preferably 10 to 70% by weight. Within such a range, it is possible to exhibit excellent feeding properties against myriapod pests, and furthermore, since the ingestion-promoting component does not crystallize even at low temperatures, the poison bait for controlling myriapod pests can be preserved. Excellent in nature. If the content of the feeding-promoting component in the chemical solution is less than 10% by weight, the feedability of myriapod pests may be insufficient. On the other hand, if the content of the food intake promoting component in the drug solution exceeds 70% by weight, the food intake promoting component may crystallize in a low temperature environment.

[attractive component]
Centipedes eat a wide range of foods, from animal proteins to plant-derived substances such as fruits and tree sap, and there are various theories about their particular favorite foods. Therefore, the present inventors conducted a detailed study on the attraction of centipedes, and found that centipedes tend to be strongly attracted to specific types of food flavoring agents. Based on this new knowledge, when a poison bait for controlling myriapod pests contains a specific kind of food flavoring as an attracting component, an excellent attracting effect was observed. Therefore, food flavoring is used as an attractant component, which is one of the main components of the chemical solution. Food flavors include, for example, fresh milk oil, strawberry essence, acetoin, mango essence, bonito/tuna extract, camembert cheese flavor, apple oil, salted bonito extract, tuna extract, banana essence, seaweed flavor, squid paste, and maple essence. is mentioned. These food flavors may be used alone, or may be used in combination. Furthermore, in the process of examining the attractability of centipedes by the present inventors, it became clear that when a surfactant is added to a poison bait for controlling myriapod pests, there is a tendency for centipede-feeding properties to decrease. rice field. Therefore, a water-soluble food flavor that does not require the addition of a surfactant is preferred. Examples of such water-soluble food flavors include strawberry essence, acetoin, mango essence, bonito/tuna extract, camembert cheese flavor, bonito salted fish extract, tuna extract, banana essence, seaweed flavor, squid paste, and maple essence. be done. The content of the attractant component in the chemical solution is preferably 0.1 to 5% by weight. Within such a range, excellent attraction to myriapod pests can be exhibited. If the content of the attracting component in the chemical solution is less than 0.1% by weight, the attraction of myriapod pests may be insufficient. On the other hand, if the content of the attractant component in the chemical solution exceeds 5% by weight, the odor may become excessively strong when the poison bait for controlling myriapod pests is installed in a closed space.

[Moisturizing ingredient]
A polyhydric alcohol is used as a moisturizing component, which is one of the main components of the liquid medicine. Examples of polyhydric alcohols include glycerin and glycols such as 1,3-butylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, diethylene glycol, triethylene glycol, hexylene glycol, and benzyl glycol. Glycerin is particularly preferred. These polyhydric alcohols may be used alone or in combination. The content of the moisturizing component in the chemical solution is preferably 10 to 40% by weight. If the content of the moisturizing component is within such a range, the poison bait for controlling myriapod pests can be prevented from drying and deteriorating after installation, and the attractability and feeding ability for centipedes can be maintained for a long period of time. If the content of the moisturizing component in the chemical solution is less than 10% by weight, the poisonous bait for controlling myriapod insect pests may dry out and degrade early after installation, failing to maintain the attraction and feeding properties for centipedes. If the content of the moisturizing component in the chemical solution exceeds 40% by weight, the concentration of the moisturizing component increases, making it difficult to properly prepare the chemical solution.

[Other ingredients]
As long as it does not interfere with the effects of the present invention, the chemical solution may contain an antifungal agent, an antibacterial agent, a disinfectant, a bittering agent such as Vitrex, and a pH adjuster for molds and fungi. , a coloring agent, etc. may be added as appropriate. Antifungal agents, antibacterial agents, and fungicides include hinokitiol, 2-mercaptobenzothiazole, 2-(4-thiazolyl)benzimidazole, 5-chloro-2-methyl-4-isothiazolin-3-one, trifoline, 3 -methyl-4-isopropylphenol, ortho-phenylphenol and the like. In addition, as described above, when a surfactant is added to a bait for controlling myriapod pests, the feeding property for centipedes tends to decrease, so the bait for controlling myriapod pests according to the present invention is It preferably contains no surfactant.

<Gelling agent>
The gelling agent gels the chemical solution to form a gel-like poison bait for controlling myriapod pests. As a result, the poison bait for controlling myriapod pests is easy to handle, and can control myriapod pests without drying for a long period of time. Examples of gelling agents that can be used include water absorbent resins, xanthan gum, carrageenan, locust bean gum, and agar. Furthermore, the present inventors have found that there is a difference in feeding properties depending on the type of gelling agent. It was found that the eating habits tended to decrease. Therefore, as the gelling agent, it is preferable to use a water-absorbing resin having low stringiness. Examples of such water-absorbent resins include acrylic acid-based water-absorbent polymers such as acrylic acid polymer partial sodium salt cross-linked products capable of absorbing water of 100 times or more of their own weight. The drug solution and gelling agent are preferably blended at a weight ratio of 20:1 to 70:1. If the compounding ratio of the liquid medicine and the gelling agent is within such a range, a granular poison bait having a hardness and a moisture content that are easily eaten by centipedes can be obtained, and a high control effect against centipedes can be obtained. When the compounding ratio of the drug solution and the gelling agent is less than 20:1, that is, when the compounding ratio of the drug solution to the gelling agent is less than 20:1, the ingestion property due to the food intake promoting component and the attraction property due to the attracting component are reduced. are not sufficiently effective and may not be able to control myriapod pests. If the compounding ratio of the chemical solution and the gelling agent is greater than 70:1, that is, if the compounding ratio of the chemical solution to the gelling agent is increased beyond 70:1, the viscosity of the poison bait for controlling myriapod pests becomes excessively small. This may result in inconvenience in handling.

Examples relating to centipede attraction and feeding using the poison bait for controlling myriapod pests of the present invention will be described below.

[Example 1]
0.3 g of dinotefuran as an insect-controlling ingredient, 1 g of acetoin and 1 g of bonito/tuna extract as an attracting ingredient, 40 g of brown sugar as an ingestion-promoting ingredient, 20 g of glycerin as a moisturizing ingredient, and 0.02 g of an isothiazoline-based antibacterial agent as other ingredients. and 0.002 g of Vitrex were mixed with purified water to make 100 g of a chemical solution. Further, 10 g of the chemical solution was dispensed into 0.3 g of a water-absorbing resin (Sanyo Kasei, Sunfresh) to swell, thereby obtaining a poison bait for controlling myriapod pests of Example 1.

The poison bait for controlling myriapod insect pests of Example 1 formed agglomeration of gel-like granules and was easy to handle. In addition, one insect to be tested (Tobizumukade) was released into a plastic case (width 21 cm, length 37 cm, height 28 cm) poured with gypsum, and after acclimatization, 2 g of the poison bait for controlling myriapod pests of Example 1. was placed in a plastic case to observe the behavior of the centipede.

Attraction confirmation tests were conducted on various food flavors, and food flavors with high attraction to centipedes were selected. In the attraction confirmation test, one test insect (Tobisomukkade) was released into a plastic case (width 21 cm, length 37 cm, height 28 cm) poured with gypsum, and after acclimatization, a petri dish containing 2 g of a food flavoring sample was placed. (3.8 cm in diameter, 1 cm in height, six small holes with a diameter of 2 mm were opened in the lid) were placed in a plastic case, and the behavior of Tobizumukade was observed for 1 hour. Three plastic cases were prepared for each sample, and the average number of contact times of Tobismukade with the Petri dish was determined. FIG. 1 is a graph showing the average number of times of exposure of Tobismukade to food flavors. FIG. 1 also shows the average contact frequency (2.9 times) of Tobizumukade with a petri dish containing 2 g of tap water as a control.

As a result of the attraction confirmation test, food flavors with an average number of contact times of 5 or more were selected as food flavors with high attraction to centipedes. Specifically, fresh milk oil, strawberry essence, acetoin, mango essence, bonito / tuna extract, camembert cheese flavor, apple oil, bonito salted fish extract, tuna extract, banana essence, nori flavor shown above the dashed line in FIG. , squid paste, and maple essence had an average number of contacts of 5 or more, and were confirmed to have excellent attractiveness.

[Examples 2 to 7, Comparative Examples 1 to 4, Reference Example 1]
According to Example 1, poison baits for controlling myriapod insect pests were prepared with the various compositions shown in Table 1, and an ingestibility confirmation test was carried out.

In the feeding confirmation test, one test insect (Tobis centipede) was released into a plastic case (width 21 cm, length 37 cm, height 28 cm) filled with gypsum. A poison bait (sample) for controlling myriapod insect pests was presented near the head of a stationary centipede, the number of times of ingestion was recorded, and the ingestion rate (%) was obtained by the following formula. Table 1 shows the test results.
Feeding rate (%) = Ce/Cd x 100
Cd: number of sample presentations Ce: number of meals

As a result of the ingestibility confirmation test, the poison baits for controlling myriapod insect pests of Examples 2 to 7 having the characteristic configuration of the present invention, Examples 2 to 4, 6 and 2 containing a plurality of types of food fragrances as attracting ingredients 7 and Example 5, which contained only one type of food flavoring as an attracting ingredient, both had an ingestion rate of 50% or more, confirming excellent ingestion. In addition, among the poison baits for controlling myriapod pests of Examples 2 to 7, Example 2, which has the lowest content of the feeding-promoting component, has the lowest feeding rate and the highest content of the feeding-promoting component. Since the ingestion rate of Example 7 was the highest, it was confirmed that the more the content of the ingestion-promoting component, the more the ingestibility of the poison bait for controlling myriapod pests improved. In addition, the poison baits for controlling myriapod pests of Examples 2 to 7 were agglomerates of gel-like granules. Examples 2, 4, 5, and 7, in which the mixing ratio of to and gelling agent was 50:1, had appropriate hardness and were easy to handle. Example 6, in which the compounding ratio of the chemical solution and the gelling agent was 70:1, had a slightly lower viscosity than the others, but had sufficient handleability. As described above, the poison baits for controlling myriapod pests of Examples 2 to 7, which have the characteristic configuration of the present invention, have both excellent ingestibility and good handleability. It was confirmed that it is suitable for control.

On the other hand, the poison bait for controlling myriapod pests of Comparative Example 1, which does not contain the feeding-promoting component, is compared with the poison bait for controlling myriapod pests of Example 4, which has the same composition other than the feeding-promoting component. As a result, it was confirmed that the food intake rate decreased. The poison bait for controlling myriapod pests of Comparative Example 2, which does not contain an attracting component, has a higher ingestion rate than the poison bait for controlling myriapod pests of Example 4, which has the same composition other than the attracting component. was confirmed to decrease. The poison bait for controlling myriapod pests of Comparative Example 3, which does not contain a moisturizing component, has a higher ingestion rate than the poison bait for controlling myriapod pests of Example 5, which has the same composition other than the moisturizing component. was confirmed to decrease. As described above, the poison baits for controlling myriapod insect pests of Comparative Examples 1 to 3, which do not have the characteristic configuration of the present invention, all have a low ingestion rate of 41% or less, and are inferior in ingestion. One thing has been confirmed. In Comparative Example 4, a value (0.04% by weight of acetoin, 0.04% by weight of bonito/tuna extract, ) to contain the attractant component. In such Comparative Example 4, it was confirmed that the feeding rate was lower than that of the poison bait for controlling myriapod pests of Example 4, which had the same composition other than the content of the attracting component.

The poison bait for controlling myriapod insect pests of Reference Example 1 containing a surfactant contained 60% by weight of an ingestion-promoting component in the composition other than the surfactant, and had the highest ingestion rate of 88%. Although it was the same as the poison bait for controlling myriapod pests of Example 7, the ingestion rate was 0%. From this, it was confirmed that when a surfactant was added to the poison bait for controlling myriapod insect pests, the feeding ability for centipedes was reduced. Based on the above results, among the food fragrances selected as food flavors with high attraction to centipedes in the attraction confirmation test, strawberry essence, acetoin, mango essence, bonito and tuna extract, camembert cheese flavor, salted bonito extract, and tuna Extract, banana essence, seaweed flavor, squid paste, and maple essence are more suitable attractants when preparing poison baits for controlling myriapod pests, as they do not require the addition of surfactants as solubilizers. It was confirmed to be a food fragrance.

The poison bait for controlling myriapod pests of the present invention can be used for exterminating myriapod pests such as centipedes and millipedes. It can be suitably used against woodworms, pill bugs, and the like.

Claims (5)

A poison bait for controlling centipedes,
Contains pest control ingredients, sugars that promote eating, food flavors that attract ingredients, polyhydric alcohols that are moisturizing ingredients, and a chemical solution that contains water and is gelled with a water-absorbent resin,
the pest control component comprises dinotefuran,
The content of the saccharide in the chemical solution is 10 to 60% by weight,
The content of the polyhydric alcohol in the chemical solution is 20 to 40% by weight,
The water-absorbing resin is an acrylic acid-based water-absorbing polymer,
The content of the attractant component in the chemical solution is 0.1 to 5% by weight,
The chemical solution and the water-absorbent resin are blended at a weight ratio of 20:1 to 70:1,
A gel-like poison bait for controlling centipedes that does not contain a surfactant (except when it contains an alginic acid ester). 2. The poison bait for controlling centipedes according to claim 1, wherein said acrylic acid-based water-absorbing polymer is capable of absorbing 100 times or more of its own weight in water. 3. The poison bait for controlling centipedes according to claim 1 or 2, wherein the acrylic acid-based water-absorbing polymer is a partially sodium salt cross-linked product of an acrylic acid polymer. The centipede-controlling poison bait according to any one of claims 1 to 3, wherein the content of the pest control component in the chemical solution is 0.3% by weight or more. The food flavor is selected from the group consisting of fresh milk oil, strawberry essence, acetoin, mango essence, bonito/tuna extract, camembert cheese flavor, apple oil, bonito salted fish extract, tuna extract, banana essence, seaweed flavor, and maple essence. 5. The poison bait for controlling centipedes according to any one of claims 1 to 4, which is at least one kind of centipede.

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