| abstract |
ABSTRACT 4-Nitro-N-phenylpyrazole derivatives of the formula: I wherein R1 represents fluorine, chlorine or bromine, R2 represents chlorine or bromine, or alkyl or alkoxy group optionally substituted by halogen, R3 is as defined for or represents hydrogen, R represents halogen, cyano or nitro, R5 represents hydrogen, an amino group -NR6R7 wherein R6 and R7, each represents hydrogen, alkyl, formyl, alkanoyl (or R6 and R7 together form a cyclic imide) which may be unsubstituted or substituted by halogen, alkoxycarbonyl which may be unsubstituted or substituted by halogen, or R5 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. |