N-phenylpyrazole derivatives
AssigneeRhone-Poulenc Agriculture Ltd.
InventorsDavid A. Roberts, David W. Hawkins, Ian G. Buntain, Ross McGuire
Life of this patent
Estimating the term…
Abstract
The invention provides N-phenylpyrazole derivatives of the formula: ##STR1## wherein R.sup.1 represents alkyl optionally substituted by halogen, R.sup.2 represents an optionally substituted aryl or aralkyl group, R.sup.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.
Claims26
A pesticidal composition comprising a pesticidally effective amount of a compound of the formula ##STR6## wherein:
- R.sup.1 represents a straight or branched chain alkyl group having up to 4 carbon atoms, which may be unsubstituted or substituted by one or more halogen atoms;
- R.sup.2 represents a phenyl or benzyl group, optionally substituted on the aromatic ring by one or more halogen atoms;
- optionally halogenated alkyl, alkoxy, alkylthio, alkylsulphinyl or alkylsulphonyl groups having up to 4 carbon atoms and being straight or branched chain;
- or nitro, cyano or acyl groups;
- and when R.sup.2 represents benzyl, optionally .alpha.-substituted by a straight or branched chain alkyl group having up to 4 carbon atoms;
- R.sup.3 represents a phenyl group substituted in the 2-position by a halogen atom;
- in the 4-position by a straight or branched chain alkyl or alkoxy group having from 1 to 4 carbon atoms which may be unsubstituted or substituted by one or more halogen atoms;
- and optionally in the 6-position by a halogen atom;
- and m and n are independently 0, 1 or 2;
- and an agriculturally acceptable carrier therefor.
A method of combating an arthropod, plant nematode, helminth or protozoal pest at a locus, which comprises applying to said locus a pesticidally effective amount of a compound of the formula ##STR7## wherein:
- R.sup.1 represents a straight or branched chain alkyl group having up to 4 carbon atoms, which may be unsubstituted or substituted by one or more halogen atoms;
- R.sup.2 represents a phenyl or benzyl group, optionally substituted on the aromatic ring by one or more halogen atoms;
- optionally halogenated alkyl, alkoxy, alkylthio, alkylsulphenyl or alkylsulphonyl groups having up to 4 carbon atoms and being straight or branched chain;
- or nitro, cyano or acyl groups;
- and when R.sup.2 represents benzyl, optionally .alpha.-substituted by a straight or branched chain alkyl group having up to 4 carbon atoms;
- R.sup.3 represents a phenyl group substituted in the 2-position by a halogen atom;
- in the 4-position by a straight or branched chain alkyl or alkoxy group having from 1 or 4 carbon atoms which may be unsubstituted or substituted by one or more halogen atoms;
- and optionally in the 6-position by a halogen atom;
- and m and n are independently 0, 1 or 2.
Dependencies are inferred from the claim text.