| abstract |
m-Phenoxybenzyl 2-(haloalkyloxy, thio, sulphinyl or sulphonyl-phenyl)-alkanoic acid esters of formula (I) as the racemates or optical isomers are new: (where RCF2X is in the metal or para position; X=S,O,SO or -SO2; R=H, F, Cl, CHF2 or CF3; R2 = ethyl, n-propyl, isopropyl, tert-butyl or isopropenyl and R3 = H or CN). Intermediates of formula (II) are also claimed: (R,X and R2 are as defined above except case where R2 = isopropenyl is not claimed). (I) protect animals and plants. They may be applied to plant foliage or the soil and give a high residual activity in the plant tissue. They are administered to animals by oral, parenteral or topical application or added to the animal feedstuff (at 0.001-0.1 wt. %). Compsns. may contain other active cpds., such as pyrethroid synergists e.g. piperonyl butoxide, sesamex or isosafrale n-octyl- sulphoxide or other insecticides, e.g. phosphates, carbamates, formamidines, chlorinated hydrocarbons and halobenzoylureas. (I) are partic. effective against diptera, lepidoptera, coleoptera and hormoptera and esp. useful against tobacco badworm (Heliothis virescens). |