| 摘要 |
Pyrazol-4-yl phosphates of the formula <IMAGE> wherein R1 represents a lower alkyl group, R2 is a lower alkoxy group or a lower alkylthio group, R3 represents hydrogen or a lower alkoxycarbonyl group, X is oxygen or sulfur atom, Y represents a lower alkyl, a lower alkoxy or a lower alkylthio group, a halogen atom, nitro or trifluoromethyl, and n is zero or an integer of 1, 2 or 3, or Yn represents an alkylidenedioxy containing 1 to 3 carbon atoms, have marked insecticidal-acaricidal activity against household pests, plant pests, mites, etc. without substantial toxicity to warm-blooded animals and fishes.
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