SUBSTITUTED DIENAMIDES

A compound of Formula (I): Ar(@CH)aA(@H)bQ(@H)c(CE = CE min )nCONR R (I) wherein: Ar R being one or more of hydrogen, halo, alkyl, alkenyl, alkynyl, alkoxy, amino, alkenoxy, acyloxy, acyl, all being optionally substituted, methylene dioxy, cyano, nitro, SO2, R , SOR , SR , SO2NR R , aryl, aryloxy or CO2R where R to R are all independently alkyl, R being halo, or optionally substituted alkyl and X being oxygen, sulphur, NH or N-alkyl A is -O-, -N(R )- (where R is hydrogen, alkyl or acyl), S(O)d where d is 0, 1 or 2, or a carbonyl group; a is 0 to 3; b is 0 to 12; each R is independently hydrogen, alkyl, fluoro, cyano or alkynyl and each of R and R are each chosen independently from hydrogen, alkyl and halo; Q is -CH2- or oxygen; c is 0 to 12; n is 0, 1 or 2; each E and E min is independently hydrogen or halo; and R and R are each independently hydrogen, alkyl, cycloalkyl, alkenyl or alkoxy (any of which are optionally substituted by halo, alkenyl, alkyl, cycloalkyl, alkoxy, alkynyl or cyano), or NR R forms a 5, 6 or 7 membered heterocyclic group provided that a is 0 only where Q is an oxygen. The compounds are useful as insecticides and acaricides.