寄主大小对中红侧沟茧蜂产卵和发育的影响  

Effects of Host Size on Oviposition and Development of the Endoparasitoid, Microplitis mediator Haliday

作　　者：刘小侠[1] 张青文[1] 李建成[2] 徐静[1] 

机构地区：[1]中国农业大学农学与生物技术学院,北京100094 [2]河北省农科院植保所,保定071000

出　　处：《中国生物防治》2004年第2期110-113,共4页Chinese Journal of Biological Control

基　　金：国家"973"项目(G2000016209);国家科技攻关计划项目(2001BA507A 11 02)

摘　　要：以室内饲养的棉铃虫和中红侧沟茧蜂为材料,研究了寄主大小对中红侧沟茧蜂产卵和生长发育的影响。结果表明,中红侧沟茧蜂成蜂产卵行为对寄主大小有显著的选择性。成功寄生率随寄主体重的增加而降低。寄主体重介于2～6mg时,成功寄生数占总寄生数的54 03%。被茧蜂成功寄生的95.51%为体重小于14mg的寄主幼虫,大于14mg的棉铃虫幼虫不适宜该寄生蜂产卵。对数据的相关分析表明,寄主体重与中红侧沟茧蜂茧重、茧重与成蜂重以及成蜂重与成蜂寿命之间存在极显著的正相关,寄主体重与中红侧沟茧蜂的卵和幼虫期在0.05水平上存在负相关,而茧期不受寄主大小的影响。Effects of host size on oviposition and development of Microplitis mediator, the endoparasitoid of Helicoverpa armigera were studied in laboratory. Host size had significant influence on oviposition of the female parasitoid, and the parasitization rate decreased as the host size increased. 54.03% of the parasitized host larvae had body weight of 2-6mg, 95.51% of the parasitized host larvae were less than 14mg in weight, and the host larvae over 14mg were difficult to be parasitized. Linear regression and correlation procedures were used to quantify the ralationship among parameters. The host weight at time of parasitizing was positively related with the cocoon weight of the parasitoid and the cocoon weight of parasitoid was positively related with adult weight of parasitoid. The longevity of adult was positively related with the weight of parasitoid adult, but the host weight at time of parasitizing was negatively related with egg and larval duration of the parasitoid. However, the host weight didn′t significantly affect cocoon duration.

关 键 词：中红侧沟茧蜂 棉铃虫 产卵 发育 

分 类 号：S476.3[农业科学—农业昆虫与害虫防治]