采用培养皿法测定小菜蛾绒茧蜂的定向能力。

The orientation of Cotesiaplutella was tested in a Petri dish in the laboratory.

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广赤眼蜂、涓夜蛾绒茧蜂、广大腿小蜂分别为卵期、幼虫期和蛹期的天敌优势种，其最高寄生率分别为30 %、80 %和65 %。

Among them, Trichogramma evanescens, Apanteles sp. and Brachymeria obscurata were dominant species with the highest parasitizations of 30%, 80% and 65% respectively.

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这些结果表明，菜蛾盘绒茧蜂与半闭弯尾姬蜂在同一寄主中发育时，前者具有明显的竞争优势。

These results suggest that C. plutellae have an obvious advantage over D. semiclausum in competition when both parasitoids develop in the same host.

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