instar

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个期若同时存在时，双斑恩蚜小蜂会明显增加对3和4若的产卵寄生，降低对1和2若的寄生；

Although early instar larvae were present in the host larval hemocoel, only one parasitoid survived to come out of host larva for pupation, killing the larva in the process.

当多只早同时出现于寄主的血腔中时，只有一只拟寄生者能成功地脱离寄主发育成蛹，过程中会杀死其他寄生。