1.When given all four B. tabaci instars simultaneously, E. bimaculata decreased the parasitization on the 1st and 2nd instar nymphs but increased the parasitization on the 3rd and 4th instar immatures;
在4个龄期若虫同时存在时，双斑恩蚜小蜂会明显增加对3龄和4龄若虫的产
寄生，降低对1龄和2龄若虫的寄生；
，
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