JP2588923B2 - Poison bait for pest control - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a poison bait for controlling pests.

[Conventional technology]

BACKGROUND ART Conventionally, powdered baits have been put on the market as pest control poison baits (bait preparations). However, the powdered poison bait adheres to the hands when used, scatters even after it is placed in a predetermined place, contaminates the surroundings, and infants and pets eat mistakenly. There are a number of issues in handling, especially in terms of safety. Therefore, in order to solve such a problem, for example, a tablet-type poison bait containing boric acid as a main component has already been marketed, but the content of boric acid as an active ingredient from the viewpoint of efficacy against pests, especially cockroaches, is low. 20-30
There are quite a few%. Therefore, boric acid-containing tablets are never safe for humans and animals, especially for infants. For example, in the commentary book of the 11th day, C-1475, there are cases where infants who have used a starch containing 5% boric acid have died, and the risk of accidents due to misuse of boric acid has been carefully considered. Must. In addition, since boric acid exerts its effect on cockroaches in the process of producing diarrhea and dying, a large amount of soft excrement adheres to the vicinity of cockroach habitats (cupboards and sinks), which is extremely unsanitary. In some cases, white walls, cloth materials, and other building materials are stained and the appearance is impaired.

On the other hand, when a tablet is formed using a conventional insecticide such as an organophosphorus pesticide other than boric acid or a carbamate pesticide, cockroaches repel tablets due to the odor peculiar to each active ingredient, and as a result, attracted eating The effect is worse and the control effect is significantly reduced. Furthermore, in the preparations containing these pesticides as active ingredients, the active ingredients are hydrolyzed by a trace amount of water in the system, and the decomposition reduces the content of the active ingredient itself, resulting in extremely poor control effect. .

[Problems to be solved by the invention]

As described above, in the conventional technology, there is a problem that the stability of the active ingredient, the effect of attracting and eating pests, the effect of controlling pests, and the like are not sufficient, and the problem has been solved.

[Means for solving the problem]

In order to solve the above-mentioned 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 cereals A powder is used as a main component, and a means for using the powder as a poison bait for exterminating pests is adopted. The details are described below.

First, in the present invention, examples of insect juvenile hormone-like compounds include dodecadienoate compounds, oxime ether compounds, pyridyl ether compounds, carbamate compounds and the like as shown in Table 1. Further, examples of the insect chitin formation inhibiting compound include benzoylphenylurea-based compounds as shown in 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 the compound and the type of target pest, but usually, based on the total amount of the poison bait, It is 0.01 to 2.0% by weight. The microcapsules of these harmful insect-controlling compounds in the present invention may be any microcapsules that are coated with a film having such physical strength that the microcapsule film is not destroyed during tableting of a poison bait. Examples of membrane materials for such microcapsules include formalin urea resin, polystyrene, polyvinyl acetate, polyacrylonitrile, polyethylene, polybutyl methacrylate, polyisobutylene, polybutadiene, gelatin, casein, albumin, fibrinogen, polyvinylpyrrolidone, carrageenan, sodium alginate ,
Agar, arabic gum, tragacanth gum, locust bean gum, guar gum, carboxymethylcellulose, polyvinyl sulfonic acid, sulfulose derivative, polyvinyl derivative, starch derivative, vinyl pyridine-acrylic acid copolymer, silicic acid, hollow silica, polyurea, polyurethane, polyamide , Polyester, polycarbonate,
Examples thereof include polysulfonate, polysulfonamide, and epoxy resin.

Next, as the crystalline cellulose in the present invention, for example, Avicel manufactured by Asahi Kasei Kogyo Co., Ltd. can be mentioned as a typical example, and its use amount is usually 20.0 to 60.0% by weight based on the total amount of the poison bait. Also, as shell powder,
For example, starch flour such as potato, sweet potato, and corn, and shell flour such as flour, rice flour, and corn flour can be exemplified, and its use amount is usually 10.0 to 80.0% by weight based on the total amount of the poison bait. Further, by adding sugar in the present invention, the eating effect can be further improved, and such sugars include, for example, sucrose, glucose, fructose, lactose, brown sugar, brown sugar, and brown sugar. Among them, brown sugar, brown sugar, and brown sugar are preferable, and the amount of sugar is usually 1.0 to 40.0% by weight based on the total amount of the poison bait.

In addition, in the poison bait for controlling pests of the present invention, an antioxidant, a preservative, an ingestion inhibitor, a plant essential oil, and a fragrance for enhancing attraction to pests may be added as necessary. Here, as the antioxidant, for example, erythorbic acid, sodium erysorbate, dibutylhydroxytoluene, dl-α-tocopherol, nordihydroguaiaretic acid, methylhydroxyanisole, gallic acid propyl, guaiac butter, L-cysteine hydrochloride Salts and the like, as preservatives, for example, benzoic acid, sodium benzoate, salicylic acid, diphenyl, sorbic acid, potassium sorbate, dehydroacetic acid,
Examples thereof include sodium dehydroacetate, isobutyl parahydroxybenzoate, isopropyl paraoxybenzoate, ethyl paraoxybenzoate, butyl paraoxybenzoate, propyl paraoxybenzoate, calcium propionate, and sodium propionate. Examples of the anti-feeding agent include, for example, pepper powder amaranth, amaranth aluminum lake, erythrosine, erythrosine aluminum lake, neucoccin, phloxine,
Rose Bengal, Acid Red, Tartrazine, Tartrazine Aluminum Lake, Sunset Yellow FCF,
Senset Yellow FCF Amminium Lake, Fast Green FCF, Fast Green FCF Amminium Lake, Brilliant Blue FCF, Brilliant Blue FCF Aluminum Lake, Indigo Carmine, Indigo Carmine Aluminum Lake, β-Carotene, Copper Chlorophyll and the like. Furthermore, vegetable essential oils include, for example, soybean oil, rapeseed oil, sesame oil, cottonseed oil, wheat germ oil, corn oil, sunflower oil, coconut oil, castor oil, linseed oil, and the like.Flavors such as cheese flavor, butter flavor, and peanut Flavors, peach flavors, strawberry flavors, milk flavors and the like can be mentioned.

In formulating the above-mentioned active ingredients and additives to be added as necessary, the method is not particularly limited. For example, a pesticidal compound as an active ingredient is classified by type or in a state of mixing two or more kinds. Microcapsules are formed according to a conventional method, and the resulting microcapsules of the pesticidal compound are mixed singly or in combination of two or more, and then uniformly mixed with crystalline cellulose, shell powder, sugar and other additives. The desired product can be easily obtained by tableting to an arbitrary size according to the method.

The poison bait of the present invention includes cockroaches such as cockroaches, German cockroaches, black cockroaches, ants such as black ants, black ants, etc .; , And can be used as an insecticide for insects such as Japanese beetles such as Kakumunehiratake.

〔Example〕

Examples 1 to 9: Polyurethane microencapsulated pyriproxyfen 0.05% (% by weight, the same applies hereinafter), crystalline cellulose 30.0%, dehydroacetic acid 0.1% and sugar and Potato starch was incorporated. After mixing these materials uniformly, applying a pressure of 15 kg / cm ^2,
One tablet was tableted to about 4 g (about 30 mm in diameter) to obtain a poison bait. The obtained poison 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 inhibiting spawning. The method was as follows, and the obtained results are shown in Table 3.

Stability of active ingredient: After keeping the poison bait at 50 ° C for 10 days, the residual rate of the active ingredient is measured using gas chromatography, and the residual rate is 80% or more (marked with ○) and less than 80% (X mark) was evaluated in two steps.

Attractive eating effect: A 50-year-old German cockroach (the same number of males and females) is placed in a container with a bottom area of 0.12 m ² , and a sample and a control bait are placed in the adult, and the sample is attracted from the number of test insects attracted within a certain period of time. The rate was calculated, and a two-step evaluation was performed of 70% or more (+ mark) and less than 70% (− mark) of the attraction rate.

Inhibition effect on emergence: 10-year-old larvae of the cockroach in a container with a bottom area of 100 cm ²
The animals (equal number of males and females) were placed, and the specimen and the control diet were placed therein, and thereafter, the status of emergence to adults was periodically observed. After 3 weeks, eclosion failure, wing abnormalities, and the percentage of over-age larvae
Two-step evaluations of 80% or more (+ mark) and less than 80% (-mark) were performed.

Spawning inhibitory effect: Place 10 German cockroaches (same male and female) within one week of emergence in a container with a bottom area of 100 cm ² , place the sample and control food in this, and then observe the number of eggs and the flocking rate periodically did. After 4 weeks, a two-step evaluation was performed to determine that the growth inhibition rate of the next generation against the untreated plot was 80% or more (+) and less than 80% (-).

Examples 10 to 13: crystalline cellulose 30.0%, trihydrosugar 5.0%, dehydroacetic acid
The three components of 0.1% were set to a fixed content, and the other components were blended so as to have the ratios shown in Table 4, and tabletted by the same operation as in Example 1 to obtain various kinds of the obtained poison bait. The effect was measured. The results are shown in Table 4.

Comparative Examples 1-4: Except for using a pest control compound without microencapsulation, tableting was performed in the same manner as in Examples 10 to 13, and the various effects of the obtained poison bait were examined. Also shown in Table 4.

From Table 4 it is clear that non-microencapsulated pest control compounds are significantly less effective as poison baits.

Examples 14 to 19: In addition to microencapsulated pest control compounds, microcrystalline cellulose, sugar and shell powder which are main components, antioxidants, preservatives, accidental food inhibitors, coloring agents, plant essential oils, etc. Flavorings and the like were blended as shown in Table 5 and tableted in the same manner as in Example 1 to measure various effects of the obtained poison bait. The results are also shown in Table 5, and Examples 14 to 19 all showed favorable effects. In addition, neither cracking nor disintegration of the tablet molded product was observed.

[Effects] As is clear from the above, the poison bait for controlling pests of the present invention has stability of an active ingredient, an attractive eating effect against pests, especially cockroaches, a pest control effect, an emergence inhibiting effect, and an egg-laying inhibitory effect. It is much better than conventional products in terms of handling and safety, and has no problem of cracking or disintegration as a preparation, and thus is useful as a poison bait for controlling pests such as cockroaches.

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location A01N 37/06 A01N 37/06 47/12 47/12 Z 47/34 47/34 C (72) Inventor Shigenori Tsuda 43, Sagahirosawa Goshonouchi-cho, Ukyo-ku, Kyoto-shi, Kyoto (72) Inventor Kazuyuki Maeda 18-5-714, Oimatsu-cho, Nishinomiya-shi, Hyogo (56) References JP-A-61-268602 (JP) JP-A-58-150559 (JP, A) JP-A-62-195301 (JP, A) JP-A-63-218605 (JP, A)

Claims (6)

(57) [Claims] Claims: 1. An insect growth regulator, crystalline cellulose, and cereal powder, which are at least one selected from the group consisting of an insect juvenile hormone-like compound and an insect chitin formation inhibiting compound. A poison bait for controlling pests, characterized in that: (2) The amount of each of the main components, that is, the amount of the active ingredient of the insect growth regulator is 0.01 to 2.
0% by weight, crystalline cellulose is 20.0-60.0% by weight
The poison bait for controlling pests according to claim 1, wherein the cereal powder is 10.0 to 80.0% by weight. 3. The amount of sugar used is 1.0 to 4 with respect to the total amount of the poison bait.
The poison bait for controlling pests according to claim 2, wherein the amount is 0.0% by weight. 4. The poison bait for controlling pests according to claim 1, which is formed into a tablet. 5. A method for controlling pests using the poison bait for controlling pests according to claim 1. 6. The method for controlling pests according to claim 5, wherein the pests are cockroaches, ants, beetles, beetles, and beetles.