| abstract |
The invention provides N-phenylpyrazole derivatives of the formula: (see formula I) wherein R1 represents alkyl optionally substituted by halogen, R2 represents an optionally substituted aryl or aralkyl group, R3 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. |