Pesticides

A compound of the formula:

• Q.sup.2 CR.sup.2 .dbd.CR.sup.3 CR.sup.4 .dbd.CR.sup.5 --C(.dbd.O)Z.sup.1
• Q.sup.2 (CR.sup.2 .dbd.CR.sup.3)COR.sup.4 or
• Q.sup.2 (CR.sup.2 .dbd.CR.sup.3)CR.sup.5 Z.sup.2
• or a salt thereof wherein Q.sup.2 represents ##STR10## Q is a monocyclic aromatic ring or a fused bicyclic ring system of which at least one ring is aromatic containing 9 or 10 atoms of which one may be nitrogen and the rest carbon, each ring system being optionally substituted, or Q is a dihalovinyl group or a group R.sup.6 --C.tbd.C--where R.sup.6 is C.sub.1-4 alkyl, tri C.sub.1-4 alkylsilyl, halogen or hydrogen;
• X.sup.1 is hydrogen, fluoro or chloro;
• R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are the same or different with at least one being hydrogen and the others being independently selected from hydrogen, halo, C.sub.1-4 alkyl or C.sub.1-4 haloalkyl;
• Z.sup.1 is hydroxy, C.sub.1-6 alkoxy, halo or a phosphoroimidate ester --P(O)(O-aryl)NH-aryl where aryl is C.sub.6-10 aryl;
• and Z.sup.2 is (aryl).sub.3 P, (aryl).sub.2 P(O) or (C.sub.1-4 alkoxy).sub.2 P(O) where alkoxy is C.sub.1-4 alkoxy and aryl is C.sub.6-10.