| 摘要 |
<p>Cyclopropanecarboxylic acid esters of the formula (I) wherein X1 and X2 represent methyl, fluorine, chlorine or bromine, X3 and X4 represent chlorine or bromine, and R1 represents hydrogen or ethyl, or X1 and X2 represent methyl or fluorine, with the proviso that X1 and X2 are not both fluorine, X3 and X4 represent chlorine or bromine, and R1 represents methyl, R2 represents hydrogen, methyl, cyano or ethynyl, and each of Y1 and Y2 represents hydrogen, halogen, methyl or trifluoromethyl, processes for their manufacture and their use in pest control.</p> |
