Cyfluthrin and cypermethrin among 7 pyrethroid insecticides possess the highest selective toxicity for the aphid to the ladybird, the STRs are 55.16 and 30.00, respectively.

• 7种菊酯类杀虫剂中以氟氯氰菊酯和氯氰菊酯的选择性最高，其选择性毒力比值分别为55.；16和30