| 摘要 |
<p>The present invention relates to insecticidal compositions of low toxicity to fishes and mammals characterized by containing m-(p-bromophenoxy)-.alpha.-cyanolbenzyl trans- or trans-rich-2,2-dimethyl-3- (2,2-dichlorovinyl)cyclopropanecarboxylate of the formula (I), (I) and at least one of the organo-phosphoric esters of the formula (II), (II) wherein Rl and R2 are each a Cl-C3 alkyl group, Xl, X2 and X3 are each an oxygen or sulfur atom, Yl and Y2, which may be the same or different, are each a C1-C3 lower alkyl, methylmercapto, cyano or nitro group or a halogen atom, Z is a carbon or nitrogen atom and n is 0 or 1, and/or the carbamic esters of the formula (III), (III) wherein R is a group of the formula, or in which X is a Cl-C4 alkyl or Cl-C4 alkoxyl group and n is 1 or 2, in a ratio of 1 to 1 - 100 (part by weight) of the former to the latter, and insecticides obtained by mixing said compositions with a carrier or a diluent and if necessary an additive. The term "trans-rich" shows the ratio of trans/cis is not less than 75/25.</p> |
