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寄生性昆虫对寄主各种生命活动的干扰大小依种而异,有些能使寄主很快死亡,有些则对寄主的生存和繁殖无明显影响。很多寄生于不全变态类昆虫的寄生性昆虫,可将卵产在寄主几个或所有龄期的个体中。这些寄生物对同种寄主不同个体的影响大小则又和寄主开始被寄生时的龄期密切相关。自然界的蚜虫种群常常世代重叠,多个虫型、虫期混合出现。它们的寄生蜂能寄生除卵以外的所有龄期。对于这类寄主一寄生物系统,要了解和描述寄生物对寄主数量变动的影响大小,就必须考虑到寄生物产卵时对寄主龄期的选择和寄主开始被寄生时的龄期与受影响大小之间的关系。本工作详细观察了苦苣菜蚜Hyperomyzus lactucae(L.)在不同龄期被苦
Parasitic insects vary in size from host to host for various life activities. Some may cause the host to die soon, while others have no significant effect on host survival and reproduction. Many parasitic insects parasitize the insensitive metamorphosis of insects, the eggs can be produced in the host of individuals at all or all ages. The effect of these parasites on different individuals of the same host is closely related to the age at which the host began to be parasitized. Aphid populations in nature often overlap generations, a number of pest types, mixed period of emergence. Their parasitoids can parasitize all ages except eggs. For such a host-parasitic system, to understand and describe the effect of parasites on the number of hosts, we must take into account the choice of host age when the parasites lay their eggs and the age and impact of host parasitism The relationship between the size. In this work, it was observed in detail that Hyperomyzus lactucae (L.) was bitter at different ages