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通过对茶足柄瘤蚜茧蜂(Lysiphlebus testaceipes Cresson)寄生苜蓿蚜(Aphis craccivora Koch)的一些影响因子(寄主龄期、寄主密度、雌蜂龄期及接蜂时间)的研究结果表明,在混合虫态寄主中,茶足柄瘤蚜茧蜂通常选择较小龄期的若蚜寄生。其中2龄若蚜的相对被寄生率最高,为41.96%,其次是1龄若蚜,为32.61%;3、4龄若蚜的相对寄生率较低。茶足柄瘤蚜茧蜂在不同寄主密度下的寄生率有显著差异。雌蜂蜂龄对寄生有明显影响。随着蜂龄的延长,寄生率逐渐降低;随接蜂时间的延长,寄生率也逐步增加。但达到寄生高峰的接蜂时间,再延长接蜂时间,寄生率亦不再明显增加。
The results of some influencing factors (host age, host density, fecundity age and pick-up time) of parasitized Aphis craccivora Koch in Lysiphlebus testaceipes Cresson showed that in mixed-pests Host in the state, the tea foot-handle aphid Braconidae usually choose a smaller age of aphids parasitism. The relative parasitism rate of the 2nd instar aphid was 41.96%, followed by the 1st instar aphid, which was 32.61%. The relative parasitism rates of 3rd and 4th instar aphids were lower. There were significant differences in the parasitism rates of Aphidius aphidus under different host densities. Females bee age have a significant impact on parasitism. With the prolongation of bee age, the parasitism rate gradually decreased; with the increase of pick-up time, the parasitism rate also increased gradually. However, the parasitic peak peak pick-up time, and then pick-up time, the parasitic rate is no significant increase.