A method is described for the control of nematodes and soil-borne insects in agricultural crops which comprises applying to the situs of infestation a composition containing as active ingredient a compound of the formula R--Z--(CH.sub.2).sub.n --Q wherein R is an alkyl radical of one or two carbon atoms carrying one-to-four fluorine substituents and one-to-three chlorine or bromine substituents represented as CF.sub.p X.sub.(3-p) -- or CF.sub.r X.sub.(3-r) --CF.sub.s X.sub.(2-s) --; Z is --(CH.sub.2 --CHX)-- or --(CH.dbd.CH)--; X is chlorine or bromine; Q is methyl, isopropyl, tert-butyl, or C.sub.3 -C.sub.6 cycloalkyl; n is 5 to 12 as required to yield in the compound a chain of 10 to 16 carbon atoms; p is 1 or 2; r is 2 or 3; s is 0 or 1 or 2. A process for preparation of active ingredient compounds is described, and utility of compositions against nematodes and soil-borne insects is exemplified.
本文描述了一种控制农作物线虫和土壤传播昆虫的方法,包括向受感染区域施加一种含有活性成分的组合物,所述活性成分的化合物式为R--Z--(CH.sub.2).sub.n --Q,其中R是一个烷基基团,具有一到两个碳原子,携带一到四个
氟取代基和一到三个
氯或
溴取代基,表示为CF.sub.p X.sub.(3-p) --或CF.sub.r X.sub.(3-r) --CF.sub.s X.sub.(2-s) --;Z是--(CH.sub.2 --CHX)--或--(CH.dbd.CH)--;X是
氯或
溴;Q是甲基、异丙基、叔丁基或C.sub.3 -C.sub.6环烷基;n为5到12,以产生10到16个碳原子的链状化合物;p为1或2;r为2或3;s为0或1或2。本文还描述了活性成分化合物的制备过程,并举例说明了组合物对线虫和土壤传播昆虫的效用。