Insecticidal pyrazolines

摘要

Novel insecticidal pyrazolines of the formula <IMAGE> wherein R1 and R2 represent hydrogen, C1-4 alkyl, or unsubstituted or halogen substituted phenyl, A represents optionally substituted phenyl or halogen-substituted 3-pyridyl, and X and Y individually represent hydrogen, halogen, C1-4 alkyl, halogeno-C1-4 alkyl, halogeno-C1-4 alkoxy or halogeno-C1-4 alkylthio, or X and Y together form haloalkylenedioxy, with the proviso that X and Y do not simultaneously represent hydrogen, and other provisos as well.