Compositions and method of combatting pest employing substituted benzophenone hydrozones or semicarbazones

An insecticidal or acaricidal composition comprising an inert carrier and an insecticidally or acaricidally effective amount of a compound of formula I ##STR88## in which m is 0 and n is 0 or m is 1 and n is 0 or 1;

• p is 0, 2 or 3, x is 0 or 1;
• R.sup.1, R.sup.5 and R.sup.7 are hydrogen, alkyl, haloalkyl or alkoxy or R.sup.1 and an adjacent R.sup.5 group together with the benzene to which they are attached form a naphthyl group;
• R.sup.2 and R.sup.4 may be the same or different and are hydrogen;
• alkyl;
• an ester group of formula R.sup.8 XCO, where X is oxygen or sulphur and R.sup.8 is selected from the group consisting of alkyl (optionally substituted by alkoxy, cycloalkyl, halogen, phenyl, substituted, phenyl, naphthyl, phenoxy or substituted phenoxy), cycloalkyl, alkenyl, (optionally substituted by phenyl or substituted phenyl), alkynyl, phenyl, substituted phenyl, 2-naphthyl, furyl, thienyl, pyridyl, morpholinyl, piperidyl, and thiamorpholinyl;
• an acyl group of formula R.sup.9 CO where R.sup.9 is selected from the group consisting of hydrogen, alkyl, (optionally substituted by alkoxy, cycloalkyl, halogen, phenoxy or substituted phenoxy), cycloalkyl, alkenyl (optionally substituted by phenyl or substituted phenyl), alkynyl, phenyl, substituted phenyl, 2-naphthyl, morpholinyl, piperidyl and thiamorpholinyl;
• (wherein when one of R.sup.8 or R.sup.9 contains a substituted phenyl group, the phenyl is substituted by one or more groups selected from the group consisting C.sub.1-4 alkyl, C.sub.1-4 haloalkyl, nitro, C.sub.1-4 alkoxy, C.sub.1-4 alkylthio, C.sub.1-4 dialkylamino, phenyl and halogen);
• a carbamoyl group of formula --CONR.sup.10 R.sup.11 where R.sup.10 and R.sup.11 are the same or different and are hydrogen or alkyl;
• or R.sup.2 and R.sup.4 together with the nitrogen to which they are attached form the group piperidine, pyrrolidine, thiamorpholine or morpholine;
• R.sup.3 is alkyl, optionally substituted by halogen;
• alkenyl;
• N,N-dialkylamino;
• or phenol, optionally substituted by alkyl or halogen;
• with the proviso that when p is 0, R.sup.2 and R.sup.4 are not both hydrogen.