JP7528397B2 - Ant attractants and ant bait - Google Patents

Description

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

To control crawling pests such as ants, poison baits for controlling crawling pests have been developed and put to practical use. For example, Patent Document 1 discloses a formulation for a poison bait for controlling ants that contains attractant components for attracting crawling pests, such as pupa powder, sugar, starch, and water, and a pest control agent.

JP 2017-8015 A

As mentioned above, poison bait for crawling pests contains attractants such as proteins, sugars, and carbohydrates, as well as water, which can lead to mold growth during storage or use. However, if anti-mold agents are used to prevent mold growth, this can lead to a new problem of reduced feeding interest for crawling pests.

The objective of the present invention is to provide a poison bait for controlling crawling pests that is free of mold growth for a long period of time and has high ingestibility for crawling pests.

The present inventors have conducted extensive research to solve the above problems and have arrived at the present invention. That is, the present invention relates to [1] a poison bait for crawling pests, which comprises an attractant component for crawling pests, thiabendazole, a metal pyrithione, and a crawling pest control agent.
[2] The poison bait for crawling pests as described above, wherein the metal pyrithione is zinc pyrithione.
[3] The poison bait for crawling insect pests as described above, wherein the content ratio of thiabendazole to metal pyrithione is 1.25 to 25 parts by weight of thiabendazole per 1 part by weight of metal pyrithione.
[4] The poison bait for crawling insect pests as described above, wherein the content ratio of thiabendazole to metal pyrithione is 4 to 8 parts by weight of thiabendazole per 1 part by weight of metal pyrithione.
I will provide a.

The present invention provides a poison bait for crawling pests that can be stored for long periods without mold growth and has excellent feeding properties for crawling pests, and its use makes it possible to effectively control crawling pests.

MODE FOR CARRYING OUT THE DISCLOSURE

The attractant components used in the poison bait for crawling pests of the present invention include animal protein powder, grain powder, starch, sugar, vegetable oil, etc., and are usually used as a preparation (hereinafter referred to as attractant) obtained by kneading one or more of these with thiabendazole and metal pyrithione in the presence of water. The content of the attractant is in the range of 70 to 99.999% by weight based on the total amount of the poison bait for crawling pests.

Examples of the animal protein powder include pupa powder, fish powder, krill powder, shrimp powder, earthworm powder, and adult insect powder. Examples of the grain flour include corn flour, potato flour, sweet potato flour, tapioca flour, wheat flour, barley flour, and rice flour. Examples of the starch include potato starch, wheat starch, tapioca starch, and corn starch. Examples of the sugars include monosaccharides such as glucose and fructose, disaccharides such as sucrose and maltose, starch syrup, dextrin, sorbitol, and molasses. Examples of the vegetable oil include sesame oil, peanut oil, olive oil, coconut oil, sesame oil, soybean oil, safflower oil, and rapeseed oil.

The content of each component in the attractant can be designed appropriately depending on the crawling pest to be controlled, but typically, the content of the animal protein powder is in the range of 10-25% by weight, grain flour is in the range of 10-30% by weight, starch is in the range of 10-30% by weight, sugars is in the range of 5-30% by weight, vegetable oil is in the range of 1-15% by weight, and water is in the range of 15-50% by weight based on the total weight of the attractant.

The amount of thiabendazole used in the poison bait for crawling pests of the present invention is in the range of 0.05 to 0.5% by weight, preferably 0.1 to 0.3% by weight, based on the total amount of the poison bait for crawling pests.

The metal pyrithiones used in the poison bait for crawling pests of the present invention include zinc pyrithione, copper pyrithione, iron pyrithione, magnesium pyrithione, etc., and these can be used alone or in combination of two or more. The content of the metal pyrithione is in the range of 0.01 to 0.5% by weight, preferably 0.01 to 0.2% by weight, based on the total weight of the poison bait for crawling pests.

The total content of the thiabendazole and the metal pyrithione is 0.1% by weight or more based on the total amount of the poison bait for crawling pests. The content ratio of the metal pyrithione and the thiabendazole is usually in the range of 1.25 to 25 parts by weight of the thiabendazole per 1 part by weight of the metal pyrithione, but is preferably 4 to 8 parts by weight in terms of feeding ability of the crawling pests.

The pest control agents used in the poison bait for pest control of the present invention include phenylpyrazole compounds, neonicotinoid compounds, amidinohydra compounds, carbamate compounds, organophosphorus compounds, boric acid, and insect growth regulators.

The phenylpyrazole compounds include acetoprole, ethiprole, fipronil, pyriprole, etc. The neonicotinoid compounds include clothianidin, nitenpyram, imidacloprid, thiacloprid, thiamethoxam, acetamiprid, dinotefuran, etc. The amidinohydra compounds include hydramethylnon. The carbamate compounds include fenobucarb, methoxadiazone, isoprocarb, xylylcarb, metolcarb, carbaryl, propoxur, etc. The organophosphorus compounds include acephate, butathiophos, cadsafos, chlorethoxyphos, chlorfenvinphos, chlorpyrifos, chlorpyrifos-methyl, cyanophos, DCIP, diclofenthion, dimethoate, dimethylvinphos, disulfoton, EPN, ethoprophos, etrimphos, fenthion, fenitrothion, etc. Examples of the insect growth regulator include pyriproxyfen, diflubenzuron, and fenoxycarb. The pest control agent can be used alone or in combination of two or more kinds, and an example of a combination of two or more kinds is a combination of fipronil and pyriproxyfen.

The content of the pest control agent is designed appropriately depending on the type of pest control agent, but if the pest control agent is an organic compound, it is usually 0.001 to 1% by weight of the total amount of the poison bait for crawling pests, and if it is boric acid, it is usually 1 to 30% by weight of the total amount of the poison bait for crawling pests.

The poison bait for controlling crawling pests of the present invention may further contain other ingredients, such as thickeners, antioxidants, emulsifiers, fragrances, agents to prevent accidental ingestion, viscosity adjusters, preservatives, etc. Examples of the thickeners include carboxymethylcellulose or its metal salts, xanthan gum, carrageenan, polyvinyl alcohol, polyvinylpyrrolidone, gelatin, etc. Examples of the antioxidants include dibutylhydroxytoluene and ascorbic acid. Examples of the emulsifiers include sorbitan fatty acid esters and sucrose fatty acid esters. Examples of the agents to prevent accidental ingestion include denatonium benzoate, amaranth, and erythrosine. Examples of the viscosity adjusters include ethylene glycol, propylene glycol, butylene glycol, glycerin, and polyethylene glycol with a molecular weight of 150 to 2000. The preservatives are used to prevent the growth of bacteria, and examples of such preservatives include benzoic acid, sodium benzoate, salicylic acid, sorbic acid, potassium sorbate, dehydroacetic acid, sodium dehydroacetate, methyl paraoxybenzoate, methyl paraoxybenzoate, and 1,2-benzisothiazol-3(2H)-one (hereinafter referred to as BIT).

The poison bait for controlling crawling pests of the present invention can be obtained, for example, in the form of granules or lumps, by kneading the attractant and pest control agent prepared as described above with a known kneading machine, and then extruding the kneaded product into a predetermined shape with an extruder or cutting it with a blade. Alternatively, the kneaded product can be made into tablet-shaped poison bait for controlling crawling pests using a known tablet press.

The creeping pests that the poison bait of the present invention is intended to control include ants such as brown ants, brown ants, house ants, red-spotted ants, Japanese wood ants, Argentine ants, fire ants, and red fire ants, cockroaches such as the American cockroach, the Smoky brown cockroach, and the German cockroach, woodlouses, pillbugs, and centipedes. Of these, the poison bait of the present invention has excellent feeding properties, especially for ants.

The poison bait for controlling crawling pests of the present invention can be used, for example, by storing it in a container with an opening on the side and placing it in a place where crawling pests live.

The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples.
[Preparation of attractants for pest control]

3 parts by weight of sodium carboxymethylcellulose (Kanto Chemical Co., Ltd.), 21.75 parts by weight of sugar (Mitsui Sugar Co., Ltd.), 20 parts by weight of potato starch (Kanto Chemical Co., Ltd.), 15 parts by weight of cocoon powder (Marukyu Co., Ltd.), 0.25 parts by weight of thiabendazole (Kanto Chemical Co., Ltd., hereafter referred to as TBZ), 5 parts by weight of peanut oil (Kanto Chemical Co., Ltd.), 5 parts by weight of glycerin (Kanto Chemical Co., Ltd.), 20% BIT liquid (product name: Proki Eight mixtures were prepared by mixing 0.25 parts by weight of Cell GXL (manufactured by Lonza) and 0.5 parts by weight of sorbitan mono fatty acid ester (manufactured by Kanto Chemical Co., Ltd.), and 0.01, 0.02, 0.03, 0.04, 0.06, 0.1, and 0.2 parts by weight of zinc pyrithione (manufactured by Tokyo Kasei Kogyo Co., Ltd., hereafter referred to as ZPT) were added to each mixture and mixed. Water was then added to each mixture so that the total amount became 100 parts, and the mixtures were kneaded to obtain seven types of attractants. (These are referred to as Formulation Examples 1, 2, ... 7, respectively.)

An attractant was obtained by mixing 3 parts by weight of sodium carboxymethylcellulose (Kanto Chemical), 21.75 parts by weight of sugar (Mitsui Sugar), 20 parts by weight of potato starch (Kanto Chemical), 15 parts by weight of cocoon powder (Marukyu), 5 parts by weight of peanut oil (Kanto Chemical), 5 parts by weight of glycerin (Kanto Chemical), 0.25 parts by weight of BIT 20% liquid (product name: Proxel GXL, Lonza), and 0.5 parts by weight of sorbitan mono fatty acid ester (Kanto Chemical), and adding water to make the total mixture 100 parts and kneading (hereinafter referred to as Formulation Example A).

3 parts by weight of sodium carboxymethylcellulose (Kanto Chemical), 21.75 parts by weight of sugar (Mitsui Sugar), 20 parts by weight of potato starch (Kanto Chemical), 15 parts by weight of cocoon powder (Marukyu), 0.25 parts by weight of TBZ (Kanto Chemical), 5 parts by weight of peanut oil (Kanto Chemical), 5 parts by weight of glycerin (Kanto Chemical), 0.25 parts by weight of BIT 20% liquid (product name: Proxel GXL, Lonza), and 0.5 parts by weight of sorbitan mono fatty acid ester (Kanto Chemical) were mixed together, and water was added to the mixture so that the total amount of the mixture was 100 parts, and the mixture was kneaded to obtain an attractant (hereinafter referred to as Formulation Example B).

An attractant was obtained in the same manner as in Formulation Example 1, except that 0.25% by weight of TBZ was replaced with 0.25% by weight of 2-benzimidazolyl methylcarbamate (manufactured by Tokyo Chemical Industry Co., Ltd.; hereafter referred to as BCM) (hereafter referred to as Formulation Example C).

An attractant was obtained in the same manner as in Formulation Example 1, except that 0.01 parts by weight of ZPT was replaced with 0.01 parts by weight of 2,4,5,6-tetrachloroisophthalonitrile (manufactured by Tokyo Chemical Industry Co., Ltd.; hereafter referred to as TPN) (hereafter referred to as Formulation Example D).

An attractant was obtained in the same manner as in Formulation Example 1, except that 0.01 parts by weight of ZPT was replaced with 0.01 parts by weight of 2-(thiocyanomethylthio)benzothiazole (Merck, hereafter referred to as TCMTB) (hereafter referred to as Formulation Example E).

An attractant was obtained in the same manner as in Formulation Example 1, except that 0.01 parts by weight of ZPT was replaced with 0.01 parts by weight of 2-n-octyl-4-isothiazolin-3-one (manufactured by Tokyo Chemical Industry Co., Ltd.; hereafter referred to as OIT) (hereafter referred to as Formulation Example F).

〔防カビ試験〕 [Table 1]

[Anti-mold test]

The attractant of formulation example A was placed in a polypropylene bag and stored indoors at 25°C for six months. Mold was allowed to grow on the attractant. When mold was found to have grown and identified under a microscope, it was found to be Eurotium sp. and Aspergillus sp.

The mold was suspended in ion-exchanged water in accordance with JIS Z2911, and a spore suspension having a spore count of 10 ⁴ to 10 ⁶ spores/mL was then prepared.
Then, 25 g of each of the attractants of Formulation Examples 1 to 4 and Formulation Example B was placed in individual petri dishes, and 0.5 mL of the spore suspension was dropped onto each of the attractants to create specimens, which were then incubated for two weeks in a thermohygrostat at 26°C and a relative humidity of 95%.
Then, 0.5 mL of the spore suspension was dropped again into each petri dish, and the petri dishes were incubated in a thermostatic chamber at 26° C. and 95% relative humidity for another 2 weeks. This procedure was repeated three times, and each sample was checked for the presence or absence of mold growth using a microscope after each operation. The evaluation method was as follows: samples in which mold growth was not observed were marked with an ◯, and samples in which mold growth was observed were marked with an ×.

〔喫食性試験〕 [Table 2]

[Eating test]

1 g of each of the attractants from formulation examples 2 to 7 and formulation examples A, B, C, D, E and F was placed in an open-sided container, placed in the habitat of the brown ant and Argentine ant, and retrieved after 4 hours to measure the amount consumed by the ants (degree of weight loss). The amount consumed by the attractant from formulation example A was set to 100, and the amount consumed by each attractant was calculated as a relative value.

〔毒餌剤の作成〕 [Table 3]

[Creating poison bait]

In the attractant of Formulation Example 2, 0.02% by weight of fipronil (manufactured by Tokyo Chemical Industry Co., Ltd.) and 0.1% by weight of pyriproxyfen (manufactured by Sumitomo Chemical Co., Ltd.) were added as pest control agents and kneaded to obtain the poison bait for crawling pests 1 of the present invention.

In the attractant of Formulation Example 2, 0.1% by weight of dinotefuran (manufactured by Tokyo Chemical Industry Co., Ltd.) and 0.1% by weight of pyriproxyfen (manufactured by Sumitomo Chemical Co., Ltd.) were added as pest control agents to the attractant, to obtain the poison bait 2 for crawling pests of the present invention.

To the attractant of Formulation Example 2, 0.4% by weight of hydramethylnon (manufactured by Fuji Film Wako Pure Chemical Industries, Ltd.) and 0.1% by weight of pyriproxyfen (manufactured by Sumitomo Chemical Co., Ltd.) were added as pest control agents to the attractant, and poison bait for crawling pests 3 of the present invention was obtained.

[Poison bait test 1]
Ten black mountain ants were released into a plastic cup (φ10 cm, height 10 cm), and absorbent cotton soaked in 10% sugar water was placed in the cup. 1.0 g of the poison bait 1 for crawling pests was placed in the cup, and the cup was placed under 25°C conditions, and the number of dead insects after 24 hours was observed. The test was repeated three times. It was confirmed that all black mountain ants were killed in each test.
On the other hand, in a test in which 10 black mountain ants were released into a plastic cup (φ10 cm, height 10 cm) and only absorbent cotton soaked in 10% sugar water was placed inside, no ants were dead even after 24 hours.

[Poison bait test 2]
Ten Siberian ants were released into a plastic cup (φ10 cm, height 10 cm), and absorbent cotton soaked in 10% sugar water was placed in the cup. 1.0 g of the poison bait 1 for crawling pests was placed in the cup, and the cup was placed at 25° C., and the number of dead insects after 24 hours was observed. The test was repeated three times. The results of the three tests confirmed that 97% of the Siberian ants were killed.
On the other hand, in a test in which 10 house ants were released into a plastic cup (φ10 cm, height 10 cm) and only absorbent cotton soaked in 10% sugar water was placed inside, no ants were dead even after 24 hours.

[Poison bait test 3]
Six brown ants were released into a plastic cup (φ10 cm, height 10 cm) and absorbent cotton soaked in 10% sugar water was placed in the cup. 1.0 g of the poison bait 1 for crawling pests was placed in the cup and placed at 25° C., and the number of dead insects after 48 hours was observed. The test was repeated three times. It was confirmed that all brown ants were killed in each test.
On the other hand, in a test in which six brown ants were released into a plastic cup (φ10 cm, height 10 cm) and only absorbent cotton soaked in 10% sugar water was placed inside, no deaths were observed even after 48 hours.

[Poison bait test 4]
Five pillbugs were released into a plastic cup (φ10 cm, height 10 cm) and absorbent cotton soaked in water was placed in the cup. 1.0 g of the poison bait 1 for crawling pests was placed in the cup and placed under 25° C. conditions, and the number of dead insects after 24 hours was observed. The test was repeated three times. It was confirmed that all pillbugs were killed in each test.
On the other hand, in a test in which five pill bugs were released into a plastic cup (φ10 cm, height 10 cm) and only water-soaked absorbent cotton was placed inside, no pill bugs were dead even after 24 hours.

[Poison bait test 5]
Five male German cockroaches were released into a plastic cup (φ10 cm, height 10 cm) and absorbent cotton soaked with water was placed in the cup. 1.0 g of the above-mentioned poison bait 1 for crawling pests was placed in the cup and placed under 25° C. conditions, and the number of dead insects after 48 hours was observed. The test was repeated three times. It was confirmed that all German cockroaches were killed in each test.
On the other hand, in a test in which five adult male German cockroaches were released into a plastic cup (φ10 cm, height 10 cm) and only water-soaked absorbent cotton was placed inside, no deaths were observed even after 24 hours.

Claims (2)

The ant attractant contains the attractant components thiabendazole, zinc pyrithione and water , and the content ratio of thiabendazole to zinc pyrithione is 4 to 8 parts by weight of thiabendazole per 1 part by weight of zinc pyrithione. A poison bait for ants containing the ant attractant and the pest control agent according to claim 1, wherein the content of the attractant is 70 to 99.999% by weight based on the total weight of the poison bait .