The parasitoid of the leaf miner , Pnigalio phragmitis Erdos, prefers the third instar to parasitizing.
芦苇格姬小蜂为美洲斑潜蝇的幼虫寄生蜂, 比较喜欢在美洲斑潜蝇的三龄幼虫上寄生.
The inner and outer byssuses disappear after parasitizing for 3 days.
寄生后3d,内、外足丝消失;
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