| abstract |
Pyrazolyl phosphates of the formula <IMAGE> wherein R1 is alkyl, aralkyl, or phenyl which may optionally be substituted by halogen or lower alkyl; R2 is hydrogen or lower alkyl; R3 is hydrogen, halogen, nitro, lower alkyl or -COOR6 wherein R6 is lower alkyl; R4 is lower alkyl; R5 is lower alkylthio; and X is oxygen or sulfur, have marked insecticidal-acaricidal activity against household pests, plant pests and mites, without substantial toxicity to warm-blooded animals and fish. |