The LC50 of pirimiphos-methyl in larvae of Anopheles dirus, Cu- lex fatigans and Aedes albopictus was 0.01326ppm, 0.01333ppm and 0.01045ppm respectively.

• 甲脒硫磷对大劣按蚊、致乏库蚊和白纹伊蚊幼虫的LC50分别是0.；01326PPm；