N-Phenylpyrazole derivatives.

摘要

The invention provides N-phenylpyrazole derivatives of the formula: <CHEM> wherein R<1> represents alkyl optionally substituted by halogen, R<2> represents an optionally substituted aryl or aralkyl group, R<3> represents a phenyl group substituted in the 2-position by halogen; in the 4-position by optionally halo substituted alkyl or alkoxy; and optionally in the 6-position by halogen; and m and n are independently 0, 1 or 2; which are active against arthropod, plant nematode, helminth and protozoal pests.