JPH01143806A - Poisonous bait agent for exterminating insect pest - Google Patents

Abstract

PURPOSE:To obtain the title poisonous bait agent, containing a specific insect pest exterminating agent as an active ingredient which is stable and having excellent attractant feeding and inhibitory effects on eclosion and oviposition, by tableting the above-mentioned active ingredient with crystalline cellulose, etc. CONSTITUTION:A poisonous bait agent obtained by using one or more insect growth retarder selected from insect juvenile hormonal compounds, e.g., hydroprene or pyriproxiphen, and insect chitin-forming inhibitory compounds, e.g., difluobenzuron or XRD-473, as an active ingredient and crystalline cellulose or grains, e.g., potato starch, vegetable essential oil, e.g., corn oil or sesame oil, in an amount of 0.1-10wt.% based on the total amount of the bait agent and saccharide, e.g., sucrose or black sugar, in an amount of 10.0-40.0wt.% based on the total amount of the bait agent as principal ingredients, as neces sary, adding an antioxidant, preservative, perfume, etc., and tableting and forming the resultant blend into an optional shape according to a conventional method. The above-mentioned agent is useful for exterminating cockroaches, ants, anobiids, etc.

Description

[Detailed description of the invention] [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 the main ingredient are already on the market, but boric acid as an active ingredient is not effective against pests, especially cockroaches. The content of is 2
The percentage is quite high, about 0 to 30%, so it cannot be said to be safe for humans, animals, and especially young children.
According to the 1st Bureau Manual C-1475, there are even cases of infant deaths caused by using bean powder containing 5% boric acid, and it is necessary to give sufficient consideration to the risk of accidents due to misuse of boric acid. It recognized. In addition, in the process of exerting the effect of boric acid on cockroaches, they exhibit so-called diarrhea symptoms and die, so there is a lot of soft excrement (adhering to them) around cockroach habitats (cupboards, sinks), etc., making it extremely unsanitary. can be,
Situations also occur in which building materials such as white walls and cloth are stained and the aesthetic appearance is impaired.

On the other hand, in the case of tablet-shaped poison baits for exterminating cockroaches that contain insecticides with low toxicity to humans and animals, such as insecticides similar to insect juvenile hormones or insect chitin formation inhibitors, the efficacy of these active ingredients is limited. Since it is extremely large compared to boric acid, the amount of active ingredient added to the formulation can be small compared to boric acid formulations, and it can be said that the safety of the formulation is improved in a favorable direction. When tablets are made with active ingredients such as pyrethroid compounds, carbamate compounds, etc., cockroaches avoid the tablets due to the unique odor of each active ingredient, resulting in poor attraction and eating effects and a significant drop in insecticidal efficacy. is known, and the above-mentioned insect juvenile hormone-like compounds or insect chitin-form inhibiting compounds are no exception.
In preparations containing these insecticides as active ingredients, the active ingredients are hydrolyzed by trace amounts of moisture in the system, and this decomposition reduces the content of the active ingredients themselves, resulting in extremely poor efficacy.

[Problem that the invention seeks to solve]

In this way, when using an insect juvenile hormone-like insecticide or an insect chitin formation inhibitor as poison bait as a pest control agent for cockroaches and other pests, the stability of the active ingredient and the insect attraction and feeding effect,
There was a problem that the insecticidal effect was not sufficient.

[Means for solving problems]

In order to solve the above problems, the present invention provides one or more insect growth regulators selected from the group consisting of insect juvenile hormone-like compounds and insect chitin formation inhibiting compounds, crystalline cellulose, cereal flour, and poison bait. 0.1 based on the total amount of agent
~10.0% by weight of plant essential oil and IO1θ~40.0
The main ingredient is sugar at % by weight, and this is compressed into a poisonous bait for exterminating pests. The details will be described below.

First, in the present 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.

Next, the amount of one or more insecticidal compounds selected from Table 1 and Table 2 of the group consisting of insecticidal compounds depends on the type of compound and the type of target pest, but usually, The amount is 0.01 to 2.0% by weight based on the total amount of poison bait. A representative example of the crystalline cellulose is Avicel manufactured by Asahi Kasei Industries, Ltd., and the amount used is usually 20.0 to 60.0% by weight based on the total amount of the poison bait. 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% of the total amount of poison bait.
~80.0% by weight. Preferred examples of plant essential oils include soybean oil, rapeseed oil, sesame oil, and wheat germ oil. ,
Examples include glucose, fructose, lactose, brown sugar, brown sugar, and brown sugar, among which brown sugar, brown sugar, and brown sugar are preferred.

In addition, in the poison bait for controlling pests of the present invention, antioxidants, preservatives, agents to prevent accidental ingestion, and other fragrances to enhance attractivity to pests may be added as necessary. Here, as the antioxidant, for example, erythorbic acid, sodium erythorbate, dibutylhydroxytoluene, dl-α-tocopherol, nordihydroguaiaretic acid, methylhydroxyanisole, propyl gallate, guaiac butter, L-cystine hydrochloride Examples of preservatives include benzoic acid, sodium benzoate, salicylic acid, diphenyl, sorbic acid, potassium sorbate, dehydroacetic acid, sodium dehydroacetate, isobutyl paraoxybenzoate, isopropyl paraoxybenzoate, and paraoxybenzoate. ethyl acid,
Examples include butyl paraoxybenzoate, propyl paraoxybenzoate, calcium propionate, sodium propionate, and the like. In addition, as an agent to prevent accidental ingestion,
For example, capsicum powder, amaranth, amaranth aluminum lake, erythrosine, erythrosine aluminum lake, newcoxin, phloxine, rose bengal, acid red, tartrazine, tartrazine aluminum lake, sunset yellow FCF, sunset yellow FCF aluminum lake, fast green FCF .

Examples include fast green FCF aluminum lake, brilliant blue FCF, brilliant blue FCF aluminum lake, indigo carmine, indigo carmine aluminum lake, β-carotene, copper chlorophyll, and the like. Examples of the flavor include cheese flavor, butter flavor, peanut flavor, beach flavor, strawberry flavor, milk flavor, and the like.

In formulating the above active ingredients and additives added as necessary, there are no particular limitations, but
The insecticidal compound and the plant essential oil are mixed in advance at room temperature or in a heated state, and this is mixed uniformly with sugar, crystalline cellulose, grain powder, and other substances, and then tableted into any size according to a conventional method. Just mold it.

The poisonous 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 Latam beetles and hirata beetles.

〔Example〕

Examples 1 to 6: 0.05% pyribroxifene (% is weight %, the same applies hereinafter), 30.0% crystalline cellulose, 3.0% sesame oil, 0.03% butylhydroxyanisole, and 0 dedroacetic acid. Sugar and potato starch were blended in the proportions shown in Table 3 relative to .1%. First, mix biliproxyfen and sesame oil, add sugar, crystalline cellulose, potato starch, butylhydroxyanisole, and dehydroacetic acid, mix uniformly, and add 15 min/cd.
The mixture was compressed into tablets of about 4 g (diameter: about 30 fl) by applying a pressure of 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. Evaluation method No.
3 Main stem: tI (goods) is as follows.

■ Stability of active ingredients: After keeping the poison bait at 50℃ for 10 days, the residual rate of the active ingredient was calculated using gas chromatography, and the residual rate was 80% or more (○ mark) or less than 80%. A two-level evaluation was performed with (x mark).

■ Attractive eating effect: 50 adult German cockroaches in a container with a bottom area of 0.12rd.
(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-level evaluation was conducted with - marks).

■ Inhibitory effect on emergence: 10 German cockroach final instar larvae in a container with a base area of 100
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-tiered evaluation was performed: failure to emerge, wing abnormalities, and number of suitable larvae were 80% or more (+-) and less than 80% (-).

■ Egg-laying suppression effect: Place 10 medium-sized spring cockroaches (equal numbers of males and females) within a week of emergence into a container with a bottom area of 10 G, place the specimen and control food inside the container, and then periodically measure the number of eggs laid and the number of eggs laid. The conversion rate was observed. After 4 weeks, the next generation growth inhibition rate was evaluated in two stages: 80% or more (+-) and less than 80% (- mark) relative to the untreated plot.

The above evaluation results are summarized in Table 4.

Comparative Examples 1 to 4: As shown in Table 5, the amount of sugar was kept below the limited range and the amount of potato starch was increased accordingly. I looked into it.

The obtained results are included in Table 5 Table 4 I wrote it down.

As is clear from Tables 3, 4 and 5, when no sugar is added at all (Comparative Example 1) and when the amount is less than the limited amount (
Comparative Examples 2 to 4) all showed a large difference in the stability of the active ingredients, and even if there was no difference, they were significantly inferior to any of Examples 1 to 6 in terms of attracting feeding effect, eclosion inhibition effect, and spawning inhibition effect. was.

Examples 7 to 9: 30.0% crystalline cellulose, 10.0% brown sugar, 0.03% butylhydroxyanisole, 90% dehydroic acid.
In addition to 10%, the ingredients shown in Table 6 were blended and the same operations as in Example 1 were carried out to prepare a poisonous bait.The various effects thereof were investigated and the results obtained are also listed in Table 6.

Comparative Examples 5-7: As shown in Table 6, the same operations as Examples 7-9 were performed except that no vegetable essential oil was used and the amount of potato starch was slightly increased accordingly. We prepared poisonous baits and investigated their effects. The obtained results are also listed in Table 6, and Comparative Examples 5 to 7 were all inferior in all aspects of stability, attraction effect, emergence inhibition effect, and spawning inhibition effect.

Examples 10 to 15: The ingredients shown in Table 7 were blended (numbers are weight %), the same operations as in Example 1 were performed to prepare poison baits, and the various effects of each were measured. The obtained results are also listed in Table 7, and the stability, attraction effect, emergence inhibition effect, and spawning inhibition effect were all good.

(The following is a blank space) Table 7 [Effects] As is clear from the above, the poison bait for exterminating pests of the present invention has the stability of the active ingredient, the effect of attracting insects, especially cockroaches, and the effect of inhibiting their emergence. It is much superior to conventional products in terms of its egg-laying suppressing effect and safety in handling, and there is no problem of cracking or disintegration as a formulation, making it useful as a poisonous bait for controlling pests such as cockroaches. It is.

Patent applicant: Sumitomo Chemical Co., Ltd. Same agent Kama 1) Letter 2

Claims (1)

[Claims] 0.1 to 10.0 weight of one or more insect growth regulators selected from the group consisting of insect juvenile hormone-like compounds and insect chitin formation inhibiting compounds, crystalline cellulose, grain flour, and the total amount of poison bait. % plant essential oil and 10.0
A poisonous bait for pest control, characterized in that it contains ~40.0% by weight of sugar as a main component and is compressed into a tablet.