abstract |
A method of controlling insect and acarid pests and a method of protecting plants from such pests by administering an active compound which is an N-arylthiohydrazone derivative of the formula I wherein A is C-R3 or nitrogen, B is CR4 or nitrogen and W is CR5 or a nitrogen atom, wherein at least one of A, B and W must be different from nitrogen and the other symbols have the meaning given in the claims; N-arylthiohydrazone derivatives of formula (I), processes for their preparation and compositions for controlling insect and mite pests based thereon. |