马拉硫磷溴氰菊酯混剂对几种储粮害虫的防治研究

EFFECTIVE RESEARCH OF MIXTURE OF MALATHIONDELXAMETHRIN IN CONTROL OF STORED GRAIN INSECTS

采用点滴法测定了马拉硫磷和溴氰菊酯及其混剂对玉米象成虫的毒力。结果证明：马拉硫磷溴氰菊酯混剂以ＡＢ相混时对玉米象有一定的增效作用（共毒系数为１３８．４），其余配比均表现出独立的杀虫作用。通过带药饲料法证实了马拉硫磷溴氰菊酯混剂对玉米象、赤拟谷盗、麦蛾和黄粉甲的防治效果。结果显示，该增效配剂对玉米象、赤拟谷盗和麦蛾有良好的防治作用，经济实用，在０．０５％的剂量下，药后第４０天的防效均在９０％以上；但对黄粉甲的防效甚微。

The toxicities of Deltamethrin,Malathion and mixture of MalathionDeltametdrin to Sitophilus zeamais were measures by means of topical application.The results showed that the mixrure had certain synergism to Sitophilus zeamais.As Malathion and Deltamathrin were mixed with A∶B proportion,its CTC is 138.4.effects of the mixture to Sitopgilus zeamais,Trbolium castaneum,Sitotroga cerealella and Tenebrio molitor were tested by mcans of mixed pesticide and food that feed the insects.The study indicated that effects of this mixture were high to the former three species insects,but low to the last one.For example,effects under treatment dosage contained 0.05% the mixture were over 90% to Sitophilus zeamais,Trbolium castaneum,Sitotroga cerelella at 9th days and 40th days afier exerted pesticide.