GB518453A - Insecticides - Google Patents

Abstract

518,453. Insecticides. MONSANTO CHEMICAL CO. Sept. 30, 1938, No. 28456. Convention -date, Oct. 1, 1937. [Class 81 (i)] [Also in Group IV] Insecticides consisting of a tertiary amine of the Formula:- (where R<1> is a phenyl, C-alkyl-or C-halogensubstituted phenyl group ; R<11> is a cyclohexyl or C-alkyl- or C-halogen-substituted cyclokexyl group; and R<111> is an alkyl, chloroalkyl, or alkylol group) admixed with a diluent. The diluent may be either an emulsion to be used as a spray, or a solid forming a dust or powder. Thus the compounds-may be dissolved in an emulsifying oil such as Albasol in the approximate proportions 70 per cent. insecticide and 30 per cent. oil, and this oil solution emulsified in water to a desired concentration. Usually a dilution of 1 part N-alkyl-N-benzylcyclohexylamine to 500 parts water gives a sufficiently potent spray emulsion. Gums such as karaya gum may be added. Dusts or powders may be prepared by milling or grinding the N-alkyl-compound with powdered talc, powdered bentonite, hydrated lime, sulphur, kaolin powder, walnut flour, or similar solid diluent. The preparation of the N-alkyl-N-benzyl-cyclohexylamine in such dusts or powders may vary from about 0.5 to about 10 parts by weight to 100 parts by weight of the solid diluent. A prepared powder consists of 5 parts by weight of N-amyl-N-benzylcyclohexylamine and 100 parts by weight of powdered talc. In examples, (1) emulsions of various insecticidal substances are prepared by dissolving in an equal weight of pine oil and an equal weight of Albasol, and dispersing in water to a dilution from 1-400 to 1-600. These sprays are applied to plants infested with red spider, the kills varying from 22 per cent. with N-amyl-cyclohexylamine to 100 per cent. with N-2-ethylhexyl-N-benzyl-cyclohexylamine; (2) the emulsions in (1) are sprayed on plants infested with the onion thrips, the kills varying from 22 per cent. with N-phenyl-N-benzylcyclohexylamine to 96 per cent. with N-amyl- N-benzyl-cyclohexylamine.