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２００１年６～７月在密云县河南寨镇北单家庄村１３．３hm２露地番茄田，应用松毛虫赤眼蜂（Trichogrammardendrolimi）、螟黄赤眼蜂（T．chilonis）及近年筛选出的本地优势蜂种（种名待鉴定）共３种蜂进行不同蜂种不同蜂量防治番茄二代棉铃虫试验。每种蜂均设６６７m２放蜂量
From June to July 2001, in the 13.3hm2 open-field tomato field in North Shanjiazhuang Village, Henan Zhaizhen, Miyun County, Trichogrammardendrolimi, T. chilonis and the local advantages selected in recent years Bee species (species to be identified) A total of 3 kinds of bees Different bee species of different bee control tomato second generation cotton bollworm test. Each bee are set to put the amount of 667m2 bee