N-phenyl pyrazole derivatives their composition and a method of use thereof

摘要

The invention provides N-phenylpyrazole derivatives of the formula: wherein R<1> represents alkyl optionally substituted by halogen, R<2> represents alkyl, alkenyl or alkynyl optionally substituted by halogen, 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.