Oil insecticide designed on the basis of pyrethroids

 

(57) Abstract:

Describes oil insecticide designed on the basis of pyrethroids containing as active ingredient-cyano-3-phenoxybenzyl-CIS-2,2-dimethyl-3-(2,2-dichlorovinyl)-cyclopropanecarboxylate or (S)--cyano-3-phenoxybenzyl-(S)-2-(4-chlorophenyl)-3-methylbutyrate and further comprises a fatty alcohol ethoxylates C12-C14and the co-solvent is an industrial oil in the following ratio, wt.%: active substance 5-10, ethoxylates of fatty alcohols 2,5-7,5, ethoxylated ALKYLPHENOLS 2,5-7,5, dodecylbenzenesulfonate calcium 2,5-7,5, xylene 15-40, industrial oil, the rest is up to 100. The technical result is to increase the stability of the aqueous emulsion through the use of effective surfactants, high biological activity at high ambient temperatures, increasing the adhesiveness of the drug. 3 table.

The invention relates to oil insecticidal compositions based on active ingredients-cyano-3-phenoxybenzyl-CIS-2,2-dimethyl-3-(2,2-dichlorovinyl)-cyclopropanecarboxylate known as cypermethrin and beta-cypermetrin, to combat biting and sucking pests (Handbook of pesticides and agrochemicals permitted for use in the Russian Federation, M., 2000).

Cypermethrin and esfenvalerate are to synthetic pyrethroids, and they produced a number of drugs in the form of an emulsion concentrate under the trade names Kinex and Sumi-alpha, as well as in the form of wettable powders and aerosols.

In agriculture most often used part in the form of emulsion concentrate as the most effective and simple to prepare the application form for spraying agricultural crops.

Liquid insecticide formulations based on pyrethroids, such as beta-cypermethrin and esfenvalerate, besides the active substance, contain various aromatic solvents (U.S. Pat. USA 4136195), for example xylene (U.S. Pat. USA 4024163), nefras (ed. mon. The USSR 1697670), anionic and nonionic surfactants, for example calcium salt of Las, polyoxyethylene esters (U.S. Pat. USA 4136195, 4469675), ethoxylated ALKYLPHENOLS (ed. mon. The USSR 1697670), the ethoxylated polyarylenes (U.S. Pat. USA 5912267) and various auxiliary additives, such as antioxidants (U.S. Pat. USA you, for example, cypermethrin and esfenvalerate comprising a surfactant system comprising one or more surfactants of the type sulfated anionic surfactants, sulfonated anionic surfactants, sulfosuccinate anionic surfactants, Quaternary ammonium cationic surfactants and amphoteric surfactants, and at least one nonpolar organic solvent, which is used as benzyl alcohol, benzoylacetate, pine oil, xylene, finitely alcohol, Phenoxyethanol, butylphthalate (U.S. Pat. USA N 5536305).

The main disadvantages of the known forms: low biological efficiency at elevated temperatures of use, complexity of composition, which greatly complicates the technology of their production, the lack of stability of drugs during storage.

The closest prototype is a composition based on pyrethroids, such as active substance-cyano-3-phenoxybenzyl-CIS-2,2-dimethyl-3-(2,2-dichlorovinyl)-cyclopropanecarboxylate, including the solvent xylene and as an emulsifier mixture of dodecylbenzenesulfonate calcium and ethoxylated alkyl phenols (U.S. Pat. USSR N 1431661). Known as the ethoxylated alkyl phenols related to pianosolo with 30 mol ethylene oxide and paste simple polyalkyleneglycol ether.

The main disadvantages of the prototype: a large number of components used, the lack of stability of the resulting emulsion, increased rates of consumption of the drug for treatment of crops.

The purpose of this invention is to improve the water stability of the emulsion through the use of effective surfactants, high biological activity at high ambient temperatures, increasing the adhesiveness of the drug and, consequently, reduced consumption rates of drug use, as well as expanding the range of the used solvents,

This goal is achieved through the use of a composition based on pyrethroids, for example, -cyano-3-phenoxybenzyl-CIS-2,2-dimethyl-3-(2,2-dichlorovinyl)-cyclopropanecarboxylate or (S)--cyano-3-phenoxybenzyl-(S)-2-(4-chlorophenyl)-3-methylbutyrate, including as a co-solvent industrial oil, and additional introduction into the composition of the fatty alcohol ethoxylate WITH12-C14in the following ratios, wt.%:

Active substance - 5-10

Ethoxylates of fatty alcohols - 2,5-7,5

Ethoxylated ALKYLPHENOLS - 2,5-7,5

Dodecylbenzensulfonate calcicolous stability of the proposed structure.

Example. In the reaction flask make estimated number of xylene, add a PYRETHROID, such as beta-cypermethrin or esfenvalerate and stirred until complete dissolution. Then add ethoxylated ALKYLPHENOLS, which are used Neonol AF 9-10 (example* 3, 6) and Neonol AF 9-12 (example* 2, 5), or nonionic condensation products of n-Nonylphenol with 6 moles ethylene oxide (example* 1, 4), add dodecylbenzenesulfonate calcium, ethoxylates of fatty alcohols C12-C14, which are used Berol 905, Genapol 24-L-3, and oil industrial. Mix until a homogeneous solution. (*The numbers of the examples correspond to the numbers of recipes).

In the preparation of the inventive composition as dodecylbenzenesulfonate calcium used Radical 70/and as an industrial oil oil grade AND 12A-8A. Neonol AF9-10and Neonol AF9-12are ethoxylated ISO-nonylphenols with a degree of amoxilonline 10-12. The results of examples of the preparation of the composition given in table. 1 and 2.

Biological efficacy of the inventive compositions in the control Colorado potato beetle was studied on potato in the Nizhny Novgorod region. The results of testing the CLASS="ptx2">

Insecticidal composition based on pyrethroids containing the active substance, the solvent is xylene and the emulsifier is a mixture of dodecylbenzenesulfonate calcium and ethoxylated ALKYLPHENOLS, characterized in that the active substance composition contains-cyano-3-phenoxybenzyl-CIS-2,2-dimethyl-3-(2,2-dichlorovinyl)-cyclopropanecarboxylate or (S)--cyano-3-phenoxybenzyl-(S)-2-(4-chlorophenyl)-3-methylbutyrate and further comprises a fatty alcohol ethoxylates C12-C14and the co-solvent is an industrial oil in the following ratio, wt. %:

Active substance - 5-10

Ethoxylates of fatty alcohols - 2,5-7,5

Ethoxylated ALKYLPHENOLS - 2,5-7,5

Dodecylbenzenesulfonate calcium - 2,5-7,5

Xylene - 15-40

Industrial oil - the Rest is up to 100

 

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