JPH0267203A - Poison bait agent for exterminating insect pest - Google Patents

Abstract

PURPOSE:To obtain a poison bait agent for exterminating insect pests excellent in stability of an active ingredient, attractant, feeding and insecticidal effects on the insect pests and safety, etc., in handling by tableting a specific insecticidal compound, dextrin and a specified amount of a vegetable essential oil as essential principal ingredients. CONSTITUTION:A poison bait agent for exterminating insect pests, obtained by using one or more insecticidal compounds selected from organic phosphorus- based, carbamate-based and pyrethroid-based insecticidal compounds, dextrin and a vegetable essential oil in an amount without exceeding 10.0wt.% based on the total weight of the poison bait agent as essential principal ingredients, preferably adding one or more attractant feeding ingredients selected from saccharides, grain flours, biscuit powder and animal powder thereto and tableting the resultant mixture and especially suitable for exterminating cockroach due to far more improved above-mentioned effects than those of a conventional product without any problems of cracking and disintegrating as the formulation. The amounts of the attractant feeding ingredients based on the total weight of the poison bait agent are <=60.0wt.% saccharides, <=50.0wt.% grain flours, <=50.0wt.% biscuit powder and <=10.0wt.% animal powder.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a poisonous bait for pest control. [Prior Art] Conventionally, powdered poison baits for pest control have been used. It is molded. 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
0%, which is quite high, so tablets containing boric acid cannot be said to be safe for humans, animals, and 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 the use of boric acid-containing tenka powder, and sufficient consideration must be given to the risk of accidents caused by misuse of boric acid.Also, boric acid has a very slow effect on cockroaches. Not only does it take a week or more for the cockroach to die after ingestion, but it also causes symptoms of diarrhea during the process, leading to death. A large amount of soft excrement adheres to the surrounding areas, which is extremely unsanitary, staining building materials such as white walls and cloth materials, and damaging the aesthetic appearance.

On the other hand, in the case of tablet-shaped cockroach baits containing pest control agents other than boric acid, such as organophosphorus insecticides, carbamate insecticides, or pyrethroid insecticides, the efficacy of these active ingredients is Since boric acid is much larger than boric acid, the amount of active ingredient added to the formulation is
Compared to boric acid preparations, only a small amount is required, and it can be said that the safety of the preparation is improved in a favorable direction. However, when tablets are made using the above active ingredients other than boric acid, the unique odor of each active ingredient attracts cockroaches. The tablets are avoided, and as a result, the attraction-feeding effect is poor, and the insecticidal effect is significantly reduced. Furthermore, in preparations containing organophosphorus insecticides or carbamate insecticides as active ingredients, these active ingredients are hydrolyzed by trace amounts of moisture in the system, and due to the odor produced by the decomposition, the same repellent methods as above are required. Not only does the eating rate drop significantly (but also the content of the active ingredient itself drops, making the insecticidal effect extremely poor).

Therefore, the inventors proposed in Japanese Patent Application No. 62-52497 that one or more insecticidal compounds selected from the group consisting of organophosphorus insecticidal compounds, carbamate insecticidal compounds, and pyrethroid insecticidal compounds. disclosed a poison bait for pest control made by adding crystalline cellulose to tablets.
When making tablets using crystalline cellulose, animal powder,
Adding excellent attractant edible ingredients such as biscuit powder causes the tablets to break, making it impossible to press the tablets unless they are finely crushed.Therefore, there is no choice but to add starches and sugars as attractant edible ingredients. I was not satisfied with the effect.

[Problem to be solved by the invention]

As described above, conventional poisonous baits for controlling pests such as cockroaches are not sufficient in terms of safety for humans and livestock, stability of active ingredients, ability to attract and eat pests, insecticidal effect, and safety in handling. There was a problem, and the challenge was to solve it.

[Means to solve the problem]

In order to solve the above problems, the present invention uses one or more insecticidal compounds selected from the group consisting of organophosphorus insecticidal compounds, carbamate insecticidal compounds, and pyrethroid insecticidal compounds, dextrin, and poison bait. 50. A poisonous bait for exterminating pests that is compressed into a tablet and contains not more than 10.0% by weight of plant essential oil as an essential main ingredient based on the total amount of the agent, or in addition to these essential main ingredients, not more than 60.0% by weight of sugar; 50.
One or more edible attracting ingredients selected from the group consisting of 0% by weight or less of cereal flour, 50.0% by weight or less of biscuit flour, and 10.0% by weight or less of animal flour were added and the tablets were compressed. This method is used as a poisonous bait for exterminating pests. The details will be described below.

First, in this invention, the organophosphorus insecticidal compounds include, for example, carbinphos, chlorpyrifos, chlorpyrifos-methyl, cyanofenphos, cyanophos, diazinon, dichlorvos, fenitrothion, fenthion, malathion, naled, pirimiphos-methyl, prothiophos, pyridafenthione, salithion, Examples of carbamate insecticidal compounds include tetrachlorvinphos, trichlorfon, bromophos, propetanephos, etc., and examples of carbamate insecticidal compounds include HP) IG, carbaryl, C
Examples include PMC, ethophene carb, MPMC, MTMC, promecarb, SWEP, propoxa, etc.
In addition, pyrethroid insecticidal compounds include cypermethrin, cyphenotrin, deltamethrin, fenpropathrin, fenvalerate, kapusrin, permethrin, phenotrin, propulthrin, resmethrin,
Shiftetrin, cyfluthrin, alphamethrin,
Examples include tralomethrin, flucysulinate, etc., or their geometric and optical isomers. The amount of one or more insecticidal compounds selected from the group consisting of such insecticidal compounds depends on the type of compound and the type of target pest, but it is usually 0 to 0 with respect to the total amount of poison bait.
．． 05 to 5.0% by weight.

Next, examples of dextrin include those obtained by hydrolyzing starch from potatoes, sweet potatoes, corn, wheat, rice, etc. using acid, heat, amylase, etc., and the amount used is usually the total amount of the poison bait. The amount is 10 to 99% by weight.

Furthermore, preferred examples of vegetable essential oils include soybean oil, rapeseed oil, sesame oil, and wheat germ oil, and examples of sugars include Ifm, glucose, fructose, lactose, brown sugar, brown sugar, and brown sugar. It is possible to enumerate the
Among them, brown sugar, brown sugar, and brown sugar are preferable.

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 0 to 50.0% of the total amount of poison bait. Weight%. Biscuit powder is made by crushing commercially available biscuits, and the amount used is usually 0% based on the total amount of poison bait.
~50.0% by weight. Examples of the animal powder include fish meal, pupa meal, krill meal, and shrimp meal, and the amount used is usually 0 to 10.0% by weight based on the total amount of the poison bait.

In addition, in the poison bait for controlling pests of this invention, antioxidants, preservatives, ingestion prevention agents, bulking agents, 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. Examples include ethyl acid, 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, nyecoxin, 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 FCP 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, peach flavor, strawberry flavor, milk flavor, and the like. Examples of the filler include white carbon, diatomaceous earth, crystalline cellulose, clay, kaolin, talc, bentonite, zeolite, sepiolite, and acpulgite.

In formulating the above active ingredients and additives added as necessary, there are no particular limitations, but
For example, the insecticidal compound, dextrin, vegetable essential oil, sugar, cereals, biscuit flour, animal flour, and other substances may be uniformly mixed, and the mixture may be compressed into tablets of any desired size according to a conventional method.

The poisonous bait of the present invention includes ants such as cockroaches, red ants, and black wood ants, pill bugs, pill bugs, tobacco bugs, and snail bugs;
It can be used as a pest exterminator for insect pests such as mealworms such as the Japanese snail, hirata beetles, and hirata beetles.

〔Example〕

Examples 1 to 6: Fenitrothion 0.5% (% is weight%, the same applies hereinafter),
Vegetable essential oil, sugar grain flour, biscuit flour and animal flour were blended in proportions shown in Table 1 to 30.0% dextrin and 0.1% dehydroacetic acid.

After uniformly mixing these substances, a pressure of 15 kg/cm was applied and the mixture was compressed into tablets of about 4 g (diameter about 30 am) each to obtain a poison bait. The obtained poison bait was evaluated for stability of the active ingredient, attraction effect on cockroaches, and insecticidal effect. The evaluation method is as follows.

■ Tabletability: Applying a pressure of 15 kg/c-j, 1 tablet approx. 4 g (diameter approx.
■) Are there any cracks (x) or no (0) during tablet forming, and whether cracks will occur (x mark) or not (○ mark) when kept at 50℃ for 10 days? Each was evaluated in two stages.

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

■ Attractive eating effect: 5 adult German cockroaches in a container with a bottom area of 0.12 nf
0 insects (equal number of males and females), place the specimen and control bait inside, and calculate the attraction rate of the specimen from the number of test insects attracted within a certain time. ), 70-8
A three-level evaluation was performed: 0% (10 mark) and less than 70% (- mark).

■ Insecticidal effect: Insecticidal effect: Insecticidal effect after eating using the same method as above to determine the induced feeding effect.
90% or more of mortality rate after 4 hours (++ mark),
A three-level evaluation was performed: 80 to 90% (10 marks) and less than 80% (- marks).

The above evaluation results are summarized in Table 1.

Examples 7 to 10: Tablets were compressed in the same manner as in Example 1, except that the raw ingredients were blended in the proportions shown in Table 2, and the effects of the obtained poison baits were measured. The results are listed in Table 2.

Comparative Examples 1 to 4: Effects of poison baits obtained by tableting in exactly the same manner as Examples 7 to 10, except that sesame oil, which is a plant essential oil, was not used as shown in Table 2. and use the results as the second
Also listed in the table. It is clear from Table 2 that compositions that do not use plant essential oils are significantly less effective as poison baits.

Examples 11 to 16: In addition to the main ingredients, which are insecticidal compounds, dextrin, and plant essential oils, sugar, biscuit flour, animal powder, and anti-ingestion agents,
Flavoring agents, fillers, preservatives, etc. are blended as shown in Table 3,
The tablets were compressed by scratching in the same manner as in Example 1, and the various effects of the obtained poison bait were measured. The results are summarized in Table 4, and Examples 11 to 16 all showed favorable effects. Furthermore, no cracking or collapse of the tablet molded product was observed.

The poisonous bait for exterminating insects in Table 1 is far superior to conventional products in terms of the stability of the active ingredient, the ability to attract pests, especially cockroaches, the insecticidal effect, and the safety in handling. Since there is no problem of cracking or disintegration, it is useful as a poison bait for controlling pests such as cockroaches.

Comparative Examples 5 to 10: As shown in Table 3, the tablets were compressed in the same manner as in Examples 11 to 16, except that potato starch was used instead of dextrin, which is one of the essential main components. The results were also listed in Table 4. From Table 4, it is clear that poison baits that do not use dextrin cause cracking and disintegration of the tablet molded product, have poor tabletability, and are also inferior in attracting eating effect and insecticidal effect.

〔effect]

Claims (2)

[Claims] (1) One or more insecticidal compounds selected from the group consisting of organophosphorus insecticidal compounds, carbamate insecticidal compounds, and pyrethroid insecticidal compounds, dextrin, and 10.0% by weight based on the total amount of poison bait. A poisonous bait for exterminating pests, characterized in that it is compressed into tablets and contains plant essential oils that do not exceed . (2) 60.0% by weight or less of sugar based on the total amount of pesticide, 5
The essential main component is one or more attractant edible ingredients selected from the group consisting of 0.0% by weight or less of cereal flour, 50.0% by weight or less of biscuit flour, and 10.0% by weight or less of animal flour. The poison bait for controlling pests according to claim 1, which is added to the bait and compressed into a tablet.