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辛硫磷具有几何异构体，本文研究了辛硫磷异构体杀虫活性的立体选择性。辛硫磷顺体异构体对３种昆虫的杀虫活性均高于反体异构体，辛硫磷顺体异构体对粘虫和蚊幼虫的活性分别比反体异构体高约１倍和２５倍。
Phoxim has geometrical isomers. In this paper, the stereoselectivity of insecticidal activity of phoxim isomers was studied. The insecticidal activity of the phoxim syn-syn isomers was higher than that of the antisomers, and the phoxim cis-isomers were about 1 Times and 2 5 times.