【摘要】 为掌握自然条件下阿里山潜蝇茧蜂[Fopius arisanus(Sonan)]对橘小实蝇[Bactrocera dorsalis(Hendel)]为害的控制效果,研究阿里潜蝇茧蜂与橘小实蝇数量之比对橘小实蝇卵的被寄生率的影响和阿里山潜蝇茧蜂对橘小实蝇的持续控制效果。结果表明:当阿里山潜蝇茧蜂与橘小实蝇数量之比达到3:1时,阿里山潜蝇茧蜂对橘小实蝇卵的寄生率达57%左右,再增加阿里山潜蝇茧蜂不会显著提高橘小实蝇卵的被寄生率;阿里山潜蝇茧蜂对橘小实蝇的有效控制时间为15 d左右。由此可见,田间应用阿里山潜蝇茧蜂控制橘小实蝇为害时,阿里山潜蝇茧蜂的释放数量应为橘小实蝇田间虫口数量的3倍左右较为经济,15 d后,根据虫口数量需补充阿里山潜蝇茧蜂。更多还原

【Abstract】 To grasp parasitical efficiency of Fopius arisanus on Bactrocera dorsalis under natural conditions, this experiment studied the ratio of the number of Fopius arisanus and Bactrocera dorsalis to the influence of the by parasitic rate to eggs of Bactrocera dorsalis, and continuous control effect of Fopius arisanus to eggs of Bactrocera dorsalis. The results show that when the ratio of Fopius arisanus and Bactrocera dorsalis reachs 3 ∶1, the parasitic rate of Fopius arisanus to eggs of Bactrocera dorsalis was about 57%, adding Fopius arisanus not significantly improved the parasitic rate to eggs of Bactrocera dorsalis. The effective control time of Fopius arisanus to Bactrocera dorsalis is about 15 days. Thus, when using Fopius arisanus controls the harm of Bactrocera dorsalis Under natural conditions, In order to save costs, the numbers of releasing Fopius arisanus should be three times of Bactrocera dorsalis. After 15 days,according to the population number, will need add to release Fopius arisanus.更多还原