棉铃虫齿唇姬蜂的寄主识别与寄主选择OA北大核心CSTPCD

[Objective]In order to improve the efficiency and quality of laboratory breeding of Campole-tis chlorideae,the host discrimination ability and host selection based on tritrophic interactions were studied.[Method]The host discrimination ability of C.chlorideae by providing parasitized and healthy hosts was investigated in the laboratory.The host selection preference of C.chlorideae was compared when the same host feeding on different plants,or different hosts feeding on the same diet,or different hosts feeding on different foods through the host selection test respectively.[Result]C.chlorideae pre-ferred to lay eggs on healthy hosts,and had host discrimination ability of nonself-superparasitism which can partly avoid the occurrence of superparasitism;The host discrimination ability decreased signifi-cantly when their antennae of female were cut off.Host selection tests indicated that Helicoverpa armi-gera feeding on maize or tobacco leaves had a stronger attraction to C.chlorideae than that feeding on artificial diet,which presented more eggs laid and higher parasitism rate.The preference indexes for H.armigera feeding on tobacco and maize leaves were 0.77 and 0.74,respectively,which were signi-ficantly higher than that feeding on artificial diet 0.23 and 0.26,respectively.When H.armigera and Spodoptera litura fed on the same diet,C.chlorideae preferred to parasitize H.armigera.While,when H.armigera and Spodoptera frugiperda fed on the different diet,the females preferred to select Spodop-tera frugiperda much more than H.armigera mainly because of its artificial diets containing maize leav-es powder;Conversely,females preferred to select H.armigera only when its feeding artificial diet was replaced by maize leaves.[Conclusion]C.chlorideae has host discrimination ability,and antennae play a significant role in it.Informational chemicals from plant-host and host fitness play important roles in the host preference of C.chlorideae.Meanwhile,C.chlorideae displays a higher parasitism rate and higher superparasitism rate on the preferred host,there is a positive correlation between them.