辐射不育野蚕雄蛾田间扩散能力的研究

A STUDY ON THE SPREADING ABILITY OF RADIATION STERILIZED MALE MOTH OF Bombyx mandarina IN FIELD

采用糖醋液加活雌蛾的方法诱集回收野蚕雄蛾，研究辐射不育野蚕雄蛾的田间扩散能力。试验表明，该回收方法可以使田间释放的野蚕雄蛾的回收率达１２６％～１３５％；不育野蚕雄蛾在２４ｈ内，９０８％扩散在距释放中心半径内１５ｍ的圆周内，覆盖面积达７００ｍ２。据此，在用辐射不育法田间防治野蚕时，１ｈｍ２桑地只需设立３０个释放点就可满足防治的需要，达到较好的防治效果。

The mulberry wild silkworm (MWS),belong to the Bombycidae of Lepidoptera, is serious pest of sericulture. The female moth of MWS is sterile and the male moth is sub sterile when they were treated with 250 Gy 60 Co γ ray (dose rate:1 05 Gy/min), and their filial generations was sterile. The spreading ability of male moth of MWS in field and retrieving the marked MWS male moth with the trapping method was studied. The trapping solution was composed of sugar, vinegar, wine and alive female moth. The retrieving rate of MWS male moth amounted to 12 6%～13 5% of released moth in field. The spreading range in 24 hours for sterile MWS male moth reached to 700 m, and 90 8% of MWS male moth was in an area of 15 m radius from the releasing centre. It is concluded that thirty releasing centres per hectare are needed to make the irradiated sterilized insects spread for controlling the MWS in field.