两种赤眼蜂在米蛾卵上的过寄生及个体发育  

Superparasitism and Ontogeny of Two Trichogramma Species on Corcyra cephalonica(Stainton)

作　　者：王雷英[1] 黄静[1] 董新阳[1] 张帆[2] 李元喜[1] 

机构地区：[1]南京农业大学植物保护学院/农作物生物灾害综合治理教育部重点实验室,南京210095 [2]北京市农林科学院植物保护环境保护研究所,北京100097

出　　处：《中国生物防治学报》2015年第4期481-486,共6页Chinese Journal of Biological Control

基　　金：国家"973"计划(2013CB127605);国家自然科学基金(30871671)

摘　　要：室内以米蛾卵为寄主,观察了松毛虫赤眼蜂和玉米螟赤眼蜂的产卵及个体发育。结果发现,2种赤眼蜂在米蛾卵内均产入多于1粒的卵量,玉米螟赤眼蜂在单粒米蛾卵内产入的卵量显著高于松毛虫赤眼蜂的卵量。随发育,单粒卵内的蜂幼虫数量逐渐下降,至羽化前,单粒米蛾卵内蜂个体数量低于2头,但松毛虫赤眼蜂数量仍少于玉米螟赤眼蜂数量。2种蜂的发育模式相似,体积随产入后时间延长而增大,在72 h处和144 h处有明显的下降,分别和发育进入预蛹期及蛹到羽化的发育阶段相对应。羽化前的发育阶段分为卵期、幼虫期、预蛹期、蛹期,羽化1 d后赤眼蜂成虫咬破寄主卵壳钻出。幼虫孵化及化蛹前各蜕1次皮,整个幼虫阶段仅有1个龄期。The egg-laying and ontogeny of Trichogramma dendrolimi Matsamura and T. ostriniae Pang et Chen were investigated in the laboratory with eggs of Corcyra cephalonica （Stainton） as host. The two Trichogramma species laid more than one eggs in one host egg and T. ostriniae laid more eggs per host egg than T. dendrolimi did The wasp offspring number per host decreased to less than two when the wasps developed to pupae. However, the number of T. dendrolimi in the host eggs was less than that of T. ostriniae at all observation times after parasitization. The mode of ontogeny of the two Trichogramma species was similar, individual size increased after parasitization but decreased at 72 h and 144 h since parasitization, which corresponds to the stages from larva to prepupa and from pupa to adult, respectively. Furthermore, the larva molt two times, one happened at hatching and the other one at pupating, and there is only one stadium within whole larva developmental stage.

关 键 词：赤眼蜂 个体发育 卵量 体积 米蛾 

分 类 号：S476.3[农业科学—农业昆虫与害虫防治]