Fluoroalkenyl compounds and their use as pest control agents

A method of systemically controlling nematode, insect or acarid infestation of a plant, comprising applying to a plant locus an effective amount of a compound having the structure:

• ##STR29## wherein Q is C(.dbd.S)R.sub.1 wherein R.sub.1 is NHOH or NR.sub.6 R.sub.7 ;
• and
• R.sub.6 and R.sub.7 are each independently
• (i) an aliphatic or an aromatic group, optionally substituted with at least one group selected from hydroxy, alkoxy;
• halo, nitro, amino, thiol, alkylthio, carboxyl, alkoxycarbonyl, and phenyl;
• (ii) a C.sub.1 -C.sub.12 aliphatic amine group, optionally substituted with at least one group selected from hydroxy, alkoxy, halo, nitro, amino, thiol, alkylthio, carboxyl, alkoxycarbonyl, and phenyl;
• (iii) a C.sub.2 -C.sub.12 aliphatic carboxylic acid group, optionally substituted with at least one group selected from hydroxy, alkoxy, halo, nitro, amino, thiol, alkylthio, carboxyl, alkoxycarbonyl, and phenyl;
• with the proviso that when one of R.sub.6 or R.sub.7 is an aliphatic carboxylic acid group, optionally substituted with at least one group selected from hydroxy, alkoxy, halo, nitro, amino, thiol, alkylthio, carboxyl, alkoxycarbonyl, and phenyl;
• the other R group can not be an aliphatic group, an aromatic group or a second aliphatic carboxylic acid group;
• or
• any agronomically acceptable salt thereof.