When given a single instars, nymphs of B. tabaci, E. bimaculata lay more eggs on the 3rd and 4th instar nymphs than on the 1st and 2nd instars, while Er. sp. nr.

• 当只有1个龄期的烟粉虱若虫存在时，双斑恩蚜小蜂更多地寄生3龄和4龄若虫，较少寄生1龄和2龄若虫；