Gel-like insecticidal composition

FIELD: biologically active substances.

SUBSTANCE: invention provides gel-like insecticidal composition, in particular to control cockroaches, which contains lipid-microencapsulated different-type insecticides with functional additives.

EFFECT: achieved high efficiency and prolonged residual effect.

3 cl, 2 tbl, 11 ex

The invention relates to the field of chemical means of combating arthropods.

Known insecticidal gel preparation (U.S. Pat. EN 2025064), consisting of a gelling polymer, insecticide (PYRETHROID), water, glycerin, functional additives. This composition is the closest to the claimed technical nature (prototype). The disadvantage of this arrangement is the necessity of application of the drug over a large area (2,45 g/200 cm²see Example 6 of patent No. 2025064) in the absence of attractive food, providing high efficiency insecticidal drug drip when applied in doses of 0.03-0.1 g/200 cm²).

The aim of the invention is to expand the Arsenal of technical means of obtaining a gel-like insecticidal compositions, increasing the effectiveness of insecticidal gels.

This goal is achieved, we offer gel composition comprising a solution of a gelling polymer, food privlekatelj and microencapsulated in lipid microcapsules insecticides obtained by a known method (U.S. Pat. EN 2165700 AND 01 N25/28). Microcapsules are convenient and effective tool that provides the ability to make insecticides in various, including gel-like, environment. In addition, natural lipids have food appeal for the red Taraka is new and thus, increase the effectiveness of insecticide.

Distinctive features of the described compositions are applying microencapsulated in lipid microcapsules insecticides and food privlekatelj that increases the effectiveness of insecticidal gels in the fight and cockroaches.

The essence of the proposed composition is illustrated by the following examples:

Example 1.

To a mixture of 50 g of water and 65 g of glycerin was added with stirring, 2.0 g of agar. The mixture is heated, boiled for 1-2 minutes to melt the agar and cooled to 40° C. To the resulting solution was added 4.9 g microencapsulated cypermethrin containing 10% active ingredient. The mixture is cooled with stirring to solidify to obtain the target product. The cypermethrin content of 0.4%.

Example 2.

Carried out analogously to the process described in example 1, except that as the gel-forming component used gelatin in the amount of 1.5-2.0% (1.8 to 2.4 g).

Example 3.

To a mixture consisting of 50 g of water and 65 g of glycerol, with vigorous stirring for 5 min was added 40 g of dextrin, stirred until a homogeneous gel-like mass. To the resulting gel was added 6.2 g of microencapsulated cypermethrin containing 10% active ingredient. The content of cypermethrin in the target product is regarding subsection is 0.4%.

Example 4.

Carried out analogously to the process described in examples 1-3, except that the content of cypermethrin in the target product is 0.2 to 0.6%.

Example 5.

Carried out analogously to the process described in examples 1-3, except that the active substance applied chlorpyrifos containing the target product 0,4-1,0%.

Example 6.

Carried out analogously to the process described in examples 1-3, except that the active substance applied fipronil containing the target product 0,02-0,05%.

Example 7.

Carried out analogously to the process described in examples 4-6, except that the target product contains as food privlekatelj cinnamon in a concentration of 0.2 to 0.8%.

Example 8.

Carried out analogously to the process described in examples 4-6, except that the target product contains as food privlekatelj vegetable oil at a concentration of 0.2-1.0%.

Example 9.

Carried out analogously to the process described in examples 4-6, except that as the food privlekatelj target product contains 0.4% of the cinnamon and 0.5% vegetable oil.

Example 10.

Carried out analogously to the process described in examples 4-6, except that the water-glycerin mixture consists of 50 g of water and 32.5 g of glycerin.

Example 11.

Spend analogy is ichno process, in examples 4-6, except that the insecticide contribute in the form of a solution of a mixture of lipids and insecticide containing 60% lipid, 20% of the insecticide and 20% ethanol.

Tests on biological efficiency was performed by the method of free choice in the polygon area 1625 cm²on red cockroaches Blattella gennanica in the presence of alternative food and water. In the polygon containing 20 insectary cockroaches were made on a glass plate 0.25 g (0,031 g/200 cm²) drug in the form of drops and monitored for 3 days. The results of the test substances of different composition are shown in table 1. The data about the residual effects of sediments proposed compositions are given in table 2.

From the above table. 1 data shows that the proposed arrangement provides 100% death insects (p. 4, table 5) in the presence of alternative food and water. The residual effect of the drugs on non-absorbent surfaces is maintained at a high level for 5 months (table 2). Research residual effect of the proposed composition method push probe showed high efficiency of the proposed composition for 1 year (94±5,2%). The content analysis of insecticides in the proposed composition showed that when stored for 26 months at 20° With the decrease in the content of active substances is not more than 5% of the original.

Studies of the Toxicological characteristics of the proposed composition showed that when introduced into the stomach LD₅₀the drug was >5.0 g/kg for rats. Resorption through the skin in mice missing sensitizing effects were not identified. The proposed composition is classified as low-hazard substances (IV hazard class according to GOST 12.1.007-76).

Thus, the proposed composition allows to obtain a gel-like insecticidal preparations containing active substances of different classes, which expands the Arsenal of technical means of obtaining a gel-like insecticidal compositions, provides high efficiency insecticide.

Pre the proposed composition is industrially applicable and can be used in household and medical aircraft.

1. Insecticidal gel composition containing an insecticide gel-forming polymer, a solvent, additives, characterized in that it contains an insecticide or insecticides in the lipid microcapsules.

2. Insecticidal gel-like composition according to claim 1, characterized in that as an insecticide contains fipronil or phosphorus and/or PYRETHROID compounds in concentrations of 0.02 to 1.0%.

3. Insecticidal gel-like composition according to claim 1, characterized in that the functional additives contains vegetable oil in a quantity of 0.2-1.0% and/or cinnamon in the amount of 0.2 to 0.8%.