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沈阳地区麦田主要扑食性天敌有异色瓢虫、七星瓢虫、龟纹瓢虫、丽草蛉等。防治二代粘虫时(六月上、中旬)正逢这些天敌的盛发期。DDT、粘虫散等防治粘虫,麦田天敌也同时受害,严重破坏生态平衡。近年来试用除虫脲1号代替上述药剂,明显看出对粘虫防效显著,残效期长。但是,对天敌有无杀伤?药剂污染对天敌生长发育、繁殖后代有何影响?尚无系统研究。为此,1981年进行了除虫脲对麦田主要扑食性天敌影响的观察。一、材料与方法试验分室内和田间两部分。药剂:除虫脲1号(代号 TH6040)胶悬剂,有效成份20%,系唐山市化工研究所提
The main predatory enemies in the wheat fields in Shenyang are Harmonia axyridis, Coccinella septempunctata, Propylaea japonica, Radix rehmanniae and so on. Prevention and control of the second generation of armyworms (June, middle) coincided with the peak of these natural enemies. DDT, armyworm dispersal and other prevention and control of armyworms, wheat field natural enemies also suffer, seriously undermining the ecological balance. In recent years try diflubenzuron 1 instead of the above agents, it was obvious that the viscous insects significant effect, long residual period. However, whether there is any killing of natural enemies? There is no systematic study on the effects of pesticide contamination on the growth and development of natural enemies and their offspring. Therefore, in 1981, the effect of diflubenzuron on the main predation enemies in wheat field was observed. First, materials and methods Test points in the indoor and field two parts. Pharmacy: diflubenzuron 1 (codenamed TH6040) plastic suspension, the active ingredient 20%, Institute of Chemical Technology, Tangshan