JPH01224307A - Poisonous bait agent for exterminating insect pest - Google Patents

Abstract

PURPOSE:To obtain a poisonous bait agent having excellent stability and exterminating effects, containing an insect growth regulator selected from a hormone- like compound of young insect and a compound to suppress insect chitin formation, crystalline cellulose, grain powder and further saccharine. CONSTITUTION:The title poisonous agent 0.01-2.0wt.% insect growth regulator selected from a hormone-like compound of young insect (e.g. dodecadienoate compound) and a compound to suppress insect chitin formation (e.g. benzoylphenylurea compound), 20.0-60.0wt.% crystalline cellulose, 10.0-80.0wt.% grain powder (e.g. potato or wheat flour) and 1.0-40.0wt.% saccharide (e.g. muscovado). The poisonous bait agent has excellent stability, attracting and feeding effects, exterminating effects on insect pests, inhibitory effects on emergence, suppressing effects on laying eggs, safety, etc. free from problems of cracking in tableting and molding, collapse, etc. Cockroaches, ants, cigarette beetle, Heteromera, etc. are target insect pests.

Description

[Detailed description of the invention] C Industrial application field] This invention relates to a poisonous bait for pest control.

[Conventional technology]

BACKGROUND ART Conventionally, poisonous baits for exterminating pests have been applied in powder form. However, powdered poison baits can get on your hands when you use them, scatter and contaminate the surrounding area even after they are placed in a designated place, or be accidentally ingested by young children or pets. There are many problems in handling it, especially in terms of safety. Therefore, to solve this problem, for example, tablet-shaped poison baits containing boric acid as a main ingredient are already on the market, but the content of boric acid as an active ingredient is limited in terms of effectiveness against pests, especially cockroaches. 20-3
It's quite high, around 0%. Therefore, tablets containing boric acid cannot be said to be safe for humans, animals, especially young children.
For example, in the 11th day station manual C-1475, boric acid 5%
There have even been cases of infant deaths caused by using boric acid-containing tenka powder, and sufficient consideration must be given to the risk of accidents due to misuse of boric acid. In addition, in the process of exerting the effect of boric acid on cockroaches, they develop so-called diarrhea symptoms and die, so a lot of soft excrement adheres to the areas where cockroaches live (cupboards, sinks, etc.), which is extremely unsanitary. , white walls, cloth materials, and other building materials may be soiled, resulting in a loss of aesthetic appearance.

On the other hand, when conventional pest control agents such as organophosphorus insecticides and carbamate insecticides other than boric acid are made into tablets, cockroaches avoid the tablets due to the unique odor of each active ingredient, and as a result, cockroaches are attracted to the tablets. The effectiveness will be poor and the extermination effect will be significantly reduced.

Furthermore, in formulations containing these pest control agents as active ingredients, these active ingredients undergo hydrolysis in trace amounts of moisture within the system, and this decomposition reduces the content of the active ingredients themselves, making their pest control effects extremely poor. .

[Problem to be solved by the invention]

As described above, the conventional techniques have the problem that they are not sufficient in terms of the stability of the active ingredient, the ability to attract pests and the ability to exterminate insects, and it has been a challenge to solve these problems.

[Means to solve the problem]

In order to solve the above problems, the present invention provides one or more microencapsulated insect growth regulators selected from the group consisting of insect juvenile hormone-like compounds and insect chitin formation-inhibiting compounds, crystalline cellulose and ml. The main ingredient is powder, which is compressed into tablets to form a poison bait for pest control. The details will be described below.

Table m1 First, in this invention, insect juvenile hormone-like compounds include dodecagenoate compounds, oxime ether compounds, pyridyl ether compounds, carbamate compounds, etc. as shown in Table 1. Furthermore, examples of insect chitin formation inhibiting compounds include benzoyl phenyl urea compounds as shown in Table 2.

Table 2 Next, the amount of one or more pest control compounds selected from the group consisting of such pest control compounds depends on the type of compound and the type of target pest, but usually the total amount of poison bait is used. 0.01 to 2.0% by weight. and,
The microcapsules containing these effective pest control compounds in this invention may be any microcapsules that are coated with a film that has enough physical strength to prevent the microcapsule film from being destroyed when the poison bait is compressed into tablets. Examples of membrane materials for microcapsules include formalin urea resin, polystyrene, polyvinyl acetate,
Polyacrylonitrile, polyethylene, polybutyl methacrylate, polyisobutylene, polybutadiene, gelatin, casein, albumin, fibrinogen, polyvinylpyrrolidone, carrageenan, sodium alginate, agar, gum arabic, gum tragacanth, locust bean gum, guar gum, carboxymethyl cellulose,
Examples include polyvinylsulfonic acid, cellulose derivatives, polyvinyl derivatives, starch derivatives, vinylbilidine-acrylic acid copolymers, silicic acid, hollow silica, polyurea, polyurethane, polyamide, polyester, polycarbonate, polysulfonate, polysulfonamide, epoxy resin, etc. I can do it.

Next, as the crystalline cellulose in this invention, Avicel manufactured by Asahi Kasei Industries can be cited as a representative example, and the amount used is usually 2% of the total amount of poison bait.
It is 0.0 to 60.0% by weight. Examples of grain powders include starch flours such as potatoes, sweet potatoes, and corn, and grain flours such as wheat flour, rice flour, and corn flour, and the amount used is usually 10.0 to 80% of the total amount of poison bait. .0% by weight. Furthermore, by adding sugar in this invention, the eating effect can be further improved, and such sugars include, for example, sig sugar, glucose, fructose, lactose, brown sugar, brown sugar,
Examples include brown sugar, among which brown sugar, brown sugar, and brown sugar are preferred, and the amount of sugar used is usually 1.
．． It is 0 to 40.0% by weight.

In addition, in the poison bait for pest control of this invention, antioxidants, preservatives, ingestion prevention agents, plant essential oils, and other fragrances to enhance attraction to pests may be added as necessary. Here, as the antioxidant, for example,
Examples of preservatives include erythorbic acid, sodium erythorbate, dibutylhydroxytoluene, dl-α-tocopherol, nordihydroguaiaretic acid, methylhydroxyanisole, propyl gallate, guaiac butter, and L-cystine hydrochloride. For example, benzoic acid, sodium benzoate, salicylic acid, diphenyl,
Sorbic acid, potassium sorbate, dehydroacetic acid, sodium dehydroacetate, isobutyl paraoxybenzoate,
Examples include isopropyl paraoxybenzoate, ethyl paraoxybenzoate, butyl paraoxybenzoate, propyl paraoxybenzoate, calcium propionate, and sodium propionate. In addition, as the accidental ingestion prevention agent, for example, capsicum powder amaranth, amaranth aluminum lake, erythrosin, erythrosin aluminum lake, newcoccin, phloxine, rose bengal, acid left, tartrazine, tartrazine aluminum lake, sunset yellow FCF,
Sunset Yellow FCF Aluminum Lake, Fast Green FCF, Fast Green FCF Aluminum Lake, Brilliant Blue FCF, Brilliant Blue FCF Aluminum Lake, Indigo Carmine,
Indigo carmine aluminum lake, β-carotene,
Examples include copper chlorophyll. Furthermore, vegetable essential oils include soybean oil, rapeseed oil, sesame oil, cottonseed oil, wheat germ oil, corn oil, sunflower oil, coconut oil, castor oil, flaxseed oil, etc., and flavoring agents include cheese flavoring, butter flavoring, peanut oil, etc. Examples include fragrance, beach flavor, strawberry flavor, milk flavor, and the like.

When formulating the above active ingredients and additives added as necessary, the method is not particularly limited, but for example, pest control compounds as active ingredients may be prepared by type or in a mixture of two or more types. Microcapsules of pest control compounds obtained by microcapsules are mixed one by one or two or more types according to a conventional method, and crystalline cellulose, grain powder, sugar, and other additives are uniformly mixed therein. By compressing into tablets of any size according to the following, the desired product can be easily obtained.

The poison bait of this invention is suitable for cockroaches such as the American cockroach, German cockroach, and black cockroach; ants such as the American cockroach, German cockroach, and black cockroach; It can be used as an exterminator for insect pests such as hirata beetles such as hirata beetles.

〔Example〕

Examples 1 to 9: Table 3 shows 0.05% biliproxyfen microencapsulated with polyurethane (% is weight %, the same applies hereinafter), 30.0% crystalline cellulose, and 0.1% dehydroacetic acid. Sugar and potato starch were blended in the following proportions. After uniformly mixing these materials, 15kg/cm
The mixture was compressed into tablets of approximately 4 g (diameter approximately 30 mm) by applying a pressure of 100 mm to obtain a poison bait.

The obtained poisonous bait was evaluated for the stability of the active ingredient, the effect of attracting and eating cockroaches, the effect of inhibiting emergence, and the effect of suppressing spawning. The method was as follows, and the obtained results are also listed in Table 3.

■ Stability of active ingredients: After keeping the poison bait at 50'C for 10 days, the residual rate of the active ingredients was measured using gas chromatography.
A two-level evaluation was performed: 80% or more of the residual rate (O mark) and less than 80% (X mark).

■ Attractive eating effect: 50 adult German cockroaches in a container with a bottom area of 0.12n
(same number of males and females), place the specimen and control bait inside it, and calculate the attraction rate of the specimen from the number of test insects attracted within a certain time, and calculate the attraction rate of the specimen by 70% or more (+ mark). and less than 70% (
A two-stage evaluation is carried out (marked with -). ■Elosion inhibition effect: 10 German cockroach final instar larvae are placed in a container with a base area of 100 d.
The specimen and control food were placed inside the specimen (equal number of males and females), and the status of emergence into adults was then periodically observed. After 3 weeks, a two-level evaluation was performed on failure to emerge, wing abnormalities, and the proportion of the number of suitable-age larvae: 80% or more (marked with 10) and less than 80% (marked with -).

■ Egg-laying suppression effect: Place 10 German cockroaches (equal numbers of males and females) within a week of hatching into a container with a bottom area of 100 cd, place the specimen and control food inside the container, and then periodically measure the number of eggs produced and the hatching rate. Observed. After 4 weeks had elapsed, a two-tiered evaluation was performed, with the next-generation growth inhibition rate relative to the untreated plot being 80% or more (+ mark) and less than 80% (- mark).

Examples 10 to 13: The three components of crystalline cellulose 30.0%, brown sugar 5.0%, and dehydroacetic acid 0.1% have a constant content, and the other components have the proportions shown in Table 4. The resulting poison bait was formulated into tablets in the same manner as in Example 1, and the various effects of the resulting poison bait were measured. The results are also listed in Table 4.

Comparative Examples 1 to 4: Tablets were compressed in the same manner as in Examples 1O to 13, except that a pest control compound that was not microencapsulated was used.
The various effects of the obtained poison bait were investigated, and the results are also listed in Table 4.

It is clear from Table 4 that pest control compounds that are not microencapsulated are significantly less effective as poisonous baits.

Examples 14 to 19: In addition to the main ingredients, microencapsulated pest control compounds, crystalline cellulose, sugar, and grain powder, antioxidants, preservatives, ingestion prevention agents, colorants, vegetable essential oils, and other additives were added. Flavors and the like were blended as shown in Table 5, and the tablets were compressed in the same manner as in Example 1, and the various effects of the resulting poison bait were measured. The results are also listed in Table 5, and Examples 14 to 19 all showed favorable effects. Furthermore, no cracking or collapse of the tablet molded product was observed.

Table 4 *1...Microencapsulation of polyurethane*
2... Microencapsulation of hollow silica Table 5 continued *2... Microencapsulation of hollow silica *3
・・・・・・Microencapsulation of gelatin (hereinafter referred to as blank space) [Effect] As is clear from the above, the poison bait for pest control of this invention has excellent stability of the active ingredient and is effective against pests, especially cockroaches. It is far superior to conventional products in terms of attracting feeding effect, pest extermination effect, emergence inhibition effect, spawning suppression effect, and handling safety, and there is no problem of cracking or disintegration as a formulation, so it is effective against cockroaches. It is useful as a poisonous bait for controlling pests such as.

Patent applicant: Sumitomo Chemical Industries, Ltd. Same agent Kama 1) Sentence 2

Claims (6)

[Claims] (1) The main ingredients are one or more microencapsulated insect growth regulators selected from the group consisting of insect juvenile hormone-like compounds and insect chitin formation-inhibiting compounds, crystalline cellulose, and grain powder. A poisonous bait for exterminating pests. (2) The amount of each main ingredient, that is, the active ingredient of the insect growth control agent, is 0.01 to 2.0 based on the total amount of poison bait.
% by weight, and crystalline cellulose is 20.0 to 60.0
% by weight, and the amount of grain powder is 10.0 to 80.0% by weight, the poison bait for pest control according to claim (1). (3) The amount of sugar used is 1.0 to 40% of the total amount of poison bait.
．． The poison bait for controlling pests according to claim 2, which contains 0% by weight. (4) The poison bait for pest control according to claim (1), which is formed into a tablet. (5) A method for exterminating pests using the poisonous bait for exterminating pests according to claim (1). (6) The method for exterminating pests according to claim (5), wherein the pests are cockroaches, ants, grass beetles, mealworms, and flatulence beetles.