巨型褶翅小蜂的生活史和产卵行为

巨型褶翅小蜂Leucospis gigas Fabricius是小蜂总科中体型最大的物种之一,对野生传粉蜜蜂中的一些种类为害很大。在西鄂尔多斯地区首次发现其寄生当地多种植物的重要传粉昆虫沙漠石蜂Megachile(Chalicodoma)desertorum Cockerell后,对其在当地的生活史、成蜂的活动规律、寄主范围以及产卵行为进行了研究。结果表明:巨型褶翅小蜂在西鄂尔多斯地区1年发生1代,当地没有雄性个体,营孤雌生殖。雌蜂寿命30d左右,每年的6月中旬为成蜂活动高峰期。在当地只发现其寄生沙漠石蜂的老熟幼虫,其产卵行为分为3个阶段,即寻找寄主巢室、选择产卵位点与产卵、拉出产卵针。

Life history and ovipesition behavior of Leucospis gigas

Leucospis gigas Fabricius, one of the largest body-sized species in Chalcidoidea, does a great harm to some wild solitary bees. After first discovering its damage to Megachile （ Chalicodoma ） desertorum Cockerell, an important pollinator for many plants in West Erdos Region, we studied its life history, active regulation of adults, host range and ovipesition behavior. The results showed that L. gigas propagated 1 generation a year and reproduced by parthenogenesis; the female＇s life-span was about 35 days and mid-June was the active peak of adults; it parasitized only the matured larvae; the oviposition behavior could be divided into 3 steps： searching host nests, choosing the oviposition place, and extending the ovipositor stylets and laying eggs.