豇豆荚螟的生物学特性与防治技术研究

本文较全面地报道了豇豆荚螟在湖南长沙、湘潭地区的生物学特征、发生动态与环境因子的关系 ,提出了以化学防治为主的豇豆荚螟综合防治技术。豇豆荚螟在上述两地区 1年能发生 6～ 7代 ;1～ 6代各代历期依次为 33.5,2 3,2 1,2 8,34.5和 4 4天。寄主生育期可影响该虫的发生量 ,采用“治花不治角 ,打顶不打底”的施药方法 ,能提高药剂防治效果 ,降低农药残留量。在防治试验用的 12种药剂中 ,2 5%乙酰甲胺磷乳油、2 .5%敌杀死乳油、生长调节剂 5%定虫隆 (抑太保 )、细菌性杀虫剂 Bt乳剂和 HD- 1的防治效果在 80 %以上 ;灭幼脲 2号、甲氰菊酯、氯氰菊酯和辛硫磷 ,防治效果在 70 %～ 80 %之间 ;而敌百虫、乐果、敌敌畏的防治效果不达 70 %

Bionomics and control of Maruca testulalis Geyer

This paper reported the biological characters,and the relationship between occurrence dynamics and environmental factors of Maruca testulalis Geyer in regions of Changsha and Xiangtan,and suggested the IPM (Integrated Pest Management) technique taking the chemical control as the leading factor.This species occurred 6-7 generations in one year in the regions of Changsha and Xiangtan.The duration for each generation was:the first generation 33 5,the second 23,the third 21,the fourth 28,the fifth 34 5 and the sixth 44 days.Among the 12 insecticides tested,there were 5 varieties (acephate,deliamethrin,chlorfluazuron,Bacillus thuringiensis and Bt\|HD1) which showed 80% or higher control effect on Maruca testulalis Geyer,4 varieties,70%-80% control effect and 3 varieties,70% or lower control effect.