Abstract: 5-Aryl isoxazole derivatives of general formula (I): ##STR1## wherein: Ar represents phenyl optionally substituted substituted by one or more groups R.sup.2 or pyridyl substituted by one or more groups R.sup.2 ;R represents:hydrogen, --CO.sub.2 R.sup.3, --COR.sup.4, cyano, halogen, alkyl or haloalkyl;R.sup.1 represents:alkyl, haloalkyl or cycloalkyl;R.sup.2 represents:a halogen atom, R.sup.4, nitro, --CO.sub.2 R.sup.3, --OR.sup.4, --S(O).sub.m R.sup.4, --S(O).sub.m R.sup.5, --O--(CH.sub.2).sub.p --OR.sup.4 or an alkyl group substituted by --OR.sup.4 ;R.sup.3 and R.sup.4, which may be the same or different, each represent alkyl or haloalkyl;R.sup.5 represents optionally substituted phenyl;p represents an integer from 1 to 3; andm represents zero, 1 or 2;the herbicidal properties of these derivatives and their application to crop protection is described.

Abstract: Herbicidal compositions comprising (a) bromoxynil and (b) a 2-benzoylcyclohexane-1,3-dione derivative of general formula I: ##STR1## wherein (i) Z represents the hydrogen atom;R.sup.1 and R.sup.2 which may be the same or different each represents the hydrogen atom or the methyl group,R.sup.3 and R.sup.4, which may be the same or different each represents the hydrogen atom or the methyl group,X represents the chlorine atom or the nitro group,Y represents the methylsulphonyl or trifluoromethyl group; or(ii) Z represents the chlorine atom;R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each represent the hydrogen atom,X represents the chlorine atom; andY represents the methylsulphonyl group; salts thereof with agriculturally acceptable bases and their use in controlling weeds is described.

Abstract: The invention relates to nicotinic acid hydrazone derivatives of formula I: ##STR1## in which the various symbols are as defined in the description, and their use as herbicides or as intermediates in the synthesis of herbicides.

Abstract: 4-Benzoylisoxazole derivatives of formula (I): ##STR1## wherein: R represents hydrogen or --CO.sub.2 R.sup.4 ;R.sup.1 represents alkyl, haloalkyl or optionally substituted cycloalkyl;R.sup.2 represents halogen, alkyl, haloalkyl or alkyl substituted by --OR.sup.5, or a group selected from nitro, cyano, --CO.sub.2 R.sup.4, --S(O).sub.p R.sup.6, --O(CH.sub.2).sub.r OR.sup.5 and --OR.sup.5 ;R.sup.3 represents optionally substituted phenyl;X represents oxygen or --S(O)--.sub.q ;n represents zero or an integer from one to four;R.sup.4 and R.sup.5 independently represent alkyl or haloalkyl;R.sup.6 represents alkyl, haloalkyl or optionally substituted phenyl;R.sup.7 represents halogen, alkyl or haloalkyl or a group selected from nitro, cyano, --OR.sup.5 and --S(O).sub.p R.sup.6 ;p represents 0, 1 or 2; q represents 0, 1 or 2;r represents 1, 2 or 3;the herbicidal properties of these derivatives and their application to crop protection are described.

Abstract: A novel process for the synthesis of ortho-substituted benzoic acid by lithiating an unprotected benzoic acid and a number of novel orth-substituted benzoic acids are described.

Abstract: The invention provides arthropodicidal compositions comprising an arthropodicidally effective amount of (A) 5-amino-3-cyano-1-(2,6-dichloro-4-trifluoromethylphenyl)-4-trifluoromethyl sulfinylpyrazole and (B) thiodicarb, and methods of controlling arthropod pests utilizing 5-amino-3-cyano-1-(2,6-dichloro-4-trifluoromethylphenyl)-4-trifluoromethyl sulfinylpyrazole and thiodicarb.

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.

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.