麻点豹天牛化学防治试验研究

A Study on the Chemical Control Methods to Coscinesthes salicis

经多种农药、剂量、防治方法的反复比较 ,筛选出树干涂刷、注干、喷雾、喷烟等多种较理想的麻点豹天牛防治方法和措施 :应用 5 %氯氰菊酯乳油、2 5 %保得乳油分别与柴油 1∶1 5 0倍混合药剂进行树干涂刷 ,麻点豹天牛卵及幼龄幼虫防治死亡率达 80 %以上 ,最佳防治时期为产卵期及幼虫孵化期 ;应用 5 %氯氰菊酯、2 5 %保得乳油分别与柴油 1∶75倍混合药剂喷烟防治成虫 ,死亡率达 85 %以上 ,最佳防治时期为 9月上旬至 1 1月中旬 ;

Four chemical methods have good control effects to Coscinesthes salicis .Besmearing the trunk with the mixture,5% Cypepmethpin oil emulsion or 2.5% Bera-cyfluthrin oil emusion and diesel oil in the proportion of 1∶50,may kill more than 80% of the eggs and newly hatched larvae.Using the mixture of 5% Cypepmethpin or 2.5% Bera-cyfluthrin oil emusion and diesel oil as smoke emission to control the adults,may kill 85% of the adults.The best time for this method is from early September to middle November.In addition,injecting chemicals to the trunk is an effective control method to all instar larvae.