| abstract |
4-Nitro-N-phenylpyrazole derivatives of the formula: <CHEM> wherein R<1> represents fluorine, chlorine or bromine, R<2> represents chlorine or bromine, or alkyl or alkoxy group optionally substituted by halogen, R<3> is as defined for R<1> or represents hydrogen, R<4> represents halogen, cyano or nitro, R<5> represents hydrogen, an amino group -NR<6>R<7> wherein R<6> and R<7>, each represents hydrogen, alkyl, formyl, alkanoyl (or R<6> and R<7> together form a cyclic imide) which may be unsubstituted or substituted by halogen, alkoxycarbonyl which may be unsubstituted or substituted by halogen, or R<5> represents alkoxymethyleneamino which may be unsubstituted or substituted on methylene by alkyl, or represents fluorine, chlorine, bromine or iodine possess pesticidal properties; their preparation and use, and compositions containing them are described. |