拟寄生昆虫中的过寄生现象

Superparasitism in insect parasitoids.

对拟寄生昆虫同种过寄生现象做了综述。拟寄生昆虫的认识能力和寄生经历、其与寄主数量的相对比例、寄主的大小及两次被寄生的时间间隔等是导致过寄生是否出现的主要因素。过寄生常导致拟寄生昆虫发育历期延长、存活率下降、个体变小、子代雌性比降低。试验研究和大量饲养中应采取措施避免过寄生。

The research on conspecific superparasitism in insect parasitoids are reviewed.Major factors affecting superparasitism include the parasitoid's ability of host discrimination,parasitism experience of the parasitoid,relative ratio between host and parasitoid,and the duration of intervals between previous and present parasitism.Superparasitism often causes increase of development duration and decrease of survival,body size and female sex ratio in parasitoid progeny.Superparasitism should be avoided in experimentation and mass rearing.