浅黄恩蚜小蜂产雌和产雄生殖行为

Maternal Oviposition Behavior Differed between Female and Male Offsping in Encarsia sophia on Bemisia Tabaci

室内观察并比较了浅黄恩蚜小蜂的产雌和产雄生殖行为。根据观察结果,将两种生殖过程划分为四个阶段:(1)体外用触角检测寄主,(2)产卵器检测寄主体内环境,(3)排卵及(4)拔出产卵器。产雌和产雄生殖行为在寄主体内检测时的身体摆动、产卵时蜂相对静止程度、产卵器拔出动作和在寄主表面穿刺次数等方面均存在差异。在产雌和产雄生殖行为中,蜂对寄主的检测时间不存在显著差异(分别为14.84 s、15.50 s),而寄主的体内检测时间(分别为190.23 s、482.55 s),在两者间存在显著差异。产雌寄生时,雌蜂是否出现"静止"及产卵器是否抽动拔出可以作为产卵的判断标准,但对产雄寄生,则无法通过行为动作来进行判断。

The maternal oviposition behavior of Encarsia sophia on Bemisia tabaci were observed in the laboratory. The oviposition process could be divided into four steps： searching host with antenna and probing host with ovipositor, examining internal environment of host, laying egg, and pulling ovipositor. There were differences in body moving during internal host examination, movement of ovipositor, movement of body during laying egg, pulling ovipositor and probing times before laying egg between the oviposition processes leading to female and male offspring. There were no significant differences in the time needed for external host examination between ovipostion leading to female （14.84 s） and male （15.50 s） offspring. However, the time used in internal host examination for laying female egg （190.23 s） was significantly shorter than that for laying male egg （482.55 s）. Oviposition of female egg could be determined by the presence of static status of female wasp after internal host examination and the push-pull movement of ovipositor; however, it is difficult to determine whether a male egg was laid by behavior observation.