Derivatives of N-phenylpyrazoles

A compound of the formula:

• wherein:
• R.sup.1 represents cycloalkyl having from 3 to 6 carbon atoms;
• R.sup.2 represents R'SO.sub.2, R'SO, or R'S or wherein R' is straight- or branched-chain alkyl, alkenyl or alkynyl having up to 6 carbon atoms which is unsubstituted or substituted by one or more halogen atoms which are the same or different;
• or R.sup.2 is cyano, cycloalkyl having from 3 to 5 carbon atoms, straight- or branched-chain alkenyl having from 2 to 6 carbon atoms, thiocyanato, sulphamoyl which is unsubstituted or substituted by one or two straight- or branched-chain alkyl which are the same or different and which have from 1 to 6 carbon atoms, carbamoyl which is unsubstituted or substituted by one or two straight- or branched-chain alkyl which are the same or different and which have from 1 to 6 carbon atoms, straight- or branched-chain alkoxycarbonyl having from 2 to 7 carbon atoms, straight- or branched-chain alkanoyl having from 2 to 7 carbon atoms, or straight- or branched-chain alkyl having from 1 to 6 carbon atoms which is substituted by one or more halogen atoms;
• R.sup.3 represents hydrogen, or an amino group --NR"R"' wherein R" and R"', which are the same or different, each represents hydrogen, straight- or branched-chain alkenylalkyl or alkynylalkyl having up to 5 carbon atoms, straight- or branched-chain alkyl having from 1 to 6 carbon atoms, and which are unsubstituted or substituted by straight- or branched-chain alkoxycarbonyl of 2 to 5 carbon atoms, formyl, or straight- or branched-chain alkanoyl having from 2 to 7 carbon atoms and being unsubstituted or substituted with one or more halogen atoms;
• or R" and R"', together with the nitrogen atom to which they are attached, form a 5 or 6 membered cyclic imide and are themselves unsubstituted or substituted by one or more halogen atoms;
• or R.sup.3 represents straight- or branched-chain alkoxycarbonyl having from 2 to 7 carbon atoms and being unsubstituted or substituted by one or more halogen atoms, or R.sup.3 represents straight- or branched-chain alkoxymethyleneamino having from 2 to 5 carbon atoms which is unsubstituted or substituted on methylene by a straight- or branched-chain alkyl having from 1 to 4 carbon atoms;
• or R.sup.3 represents halogen, cycloalkyl having from 3 to 6 carbon atoms, cycloalkylcarbonyl having from 4 to 7 carbon atoms or straight- or branched-chain alkoxycarbonyl having from 2 to 7 carbon atoms and which are unsubstituted or substituted by one or more halogen atoms;
• or R.sup.3 represents straight- or branched-chain alkylsulphenylamino having from 1 to 4 carbon atoms, straight- or branched-chain alkoxymethyleneamino having from 2 to 5 carbon atoms which is unsubstituted or substituted on methylene by a straight- or branched-chain alkyl having from 1 to 4 carbon atoms;
• or R.sup.3 represents straight- or branched-chain alkyl having from 1 to 4 carbon atoms, carboxy, or straight- or branched-chain alkylthio, alkylsulphinyl or alkylsulphonyl having from 1 to 6 carbon atoms which is unsubstituted or substituted by one or more halogen atoms;
• or R.sup.3 represents straight- or branched-chained trialkylsilylmethyl having from 1 to 6 carbon atoms in each alkyl group which are the same or different, trialkylsilyl having from 1 to 6 carbon atoms in each alkyl group which are the same or different, or a cyano or nitro group;
• and R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are the same or different and represent halogen, straight- or branched-chain alkyl or alkoxy having from 1 to 4 carbon atoms which is unsubstituted or substituted by one or more halogen atoms, straight- or branched-chain alkylthio or alkylsulphinyl having from 1 to 4 carbon atoms which is substituted by one or more halogen atoms, nitro, cyano, or straight- or branched-chain alkylsulphonyl having from 1 to 4 carbon atoms which is unsubstituted or substituted by one or more halogen atoms.