SU586819A3 - Insecticide - Google Patents

Description

(54) INSECTICIDE MEANS

The invention relates to chemical plant protection agents, and specifically insecticidal agents based on carbamic acid derivatives. The use of carbamates' oximes, namely 2-methylmercaptoacetaldehyde 0 (S-methylcarbamoyl) -oxia max, is known. (Lanate), flj, 2-ethylmercaptoacetal dehyd-0- (And-methylcarbamoyl) -oxime tizj, as well as 2-alkylmercaptoacetaldehyde-0- (1-methylcarbamoyl) -oxime i3J as insecticides of systemic action. However, the known compounds are highly toxic to warm-blooded animals. For the purpose of searching for insecticidal agents with high insecticidal activity and low toxicity, warm-blooded insecticides are proposed based on methylcarbamic acid derivatives of the general formula RSe N-0-ci-NSN dN dSB I 11 II & II bN3 O Shz No.j , - where fij is alkyl with 1-5 C atoms, the active substance content of the medium is 0.5-95.5 ec.% f the rest is additive. The proposed compounds are obtained by reacting a compound of the general formula S e-g-c -K o-c-TSH 1 ii 1. CK5 of SIS where b has the indicated value, in the presence of a base with sulfur chlorides. Means are usually applied in the form of solutions, emulsions, pastes, powders, prepared by their known methods — the general process of making preparative forms of pesticides. Example, Insecticidal agent of intestinal action. Cotton plants are sprayed with 0, an aqueous emulsion of the active substance (obtained from a 10% emulsifying concentrate). After drying, the plants are infected with the larvae and Spodoptero uttorofis and Heftothis y | Fe2OT5 | The mortality rate is determined through 2,4,4,24 and 48 hours. After 100 hours, after 48 hours, the plants are again infected with fresh larvae and the mortality is estimated through such plants.

intervals up to 48 h. If the flOCTH is again 100% mortality, then the test is repeated after another 8 days. Experience provides with and 60% relative humidity. The results are shown in the table.

PRI mme R 2. Action against Chile wup e5saUs

In plastic gorochki grow 6 rice shoots of the variety Caloro in such a way that their roots are intertwined in the form of a disk. The roots are immersed in a solution with 0.08%, 0.02%

and 0.01% of the active substance, which is then allowed to drain. Each group is infected with 5 Chile dppre saLis larvae and plants are planted in it. The mortality rate is determined after 5 days. Compounds 1-4 give 100% mortality at all three concentrations.

Example 3: Comparison of Toxicity (LL) of Proposed and Known Compounds for Rats at a dose, mg / kg Compound No. 1 300 No. 2 320 No. 3 17-24 No. 4 15, Fominu of the Invention Insecticide containing derivatives methylcarbamic acid as an active substance, as well as an additive selected from the group of: solvent, dispersion, emulsifier, which, in order to enhance the insecticidal activity and reduce toxicity for heat energy, it contains as a derivative of methylcarbamic acid Formulas ft-SC "N-0-CNSN - 0 -N 3-S-R I where is alkyl with 1-5 carbon atoms, and the content of the active substance in the medium is 0.5-95.5 wt.%. Sources of information taken into account in the examination; 1.Melnikov N.N. Chemistry and pesticide technology. M., Himi, 1974, p. 318., 2. The patent of France 1521784, cl. C U7 C, 1968. 3. Patent of the USSR 275896, cl. A 01 I, 9/20, 1966,