烟蚜茧蜂生物防控烟蚜及蚜传病毒病的效果

目的]探究利用烟蚜茧蜂防控烟蚜及蚜传病毒病的效果。方法]研究烟蚜茧蜂防治、化学农药防治、不采用任何防治方法 3种处理对烟蚜及蚜传病毒病的防治效果。结果]在大田环境下利用繁蜂大棚持续性放蜂可有效缓解烟田烟蚜种群数量的增长,人工释放烟蚜茧蜂进行烟蚜防治后,平均有蚜株率由放蜂前的14.4%减少至3.5%,有蚜烟株平均单株蚜量由104.0头/株降至18.7头/株,利用烟蚜茧蜂防治烟蚜的虫口减退率为74.82%,防治效果达86.04%,蚜传病毒病(PVY+CMV)得到了很好的控制,病指减退率为73.07%,防治效果显著。结论]烟蚜茧蜂防治烟蚜及蚜传病毒病效果显著,并且可降低成本。

Control Effect of Using Aphidius gifuensis to Control Myzus persicae and Aphid-transm itted Viru s

Objective] The aim was to study the control effect of using Aphidius gifuensis to control Myzus persicae and aphid-transmitted virus. Method] Three treatments were set up to study the control effect on Myzus persicae, including Aphidius gifuensis, chemical pesticide and without using any prevention methods.Result] The results showed that using sheds to breeding A.gifuensis and continually releasing them into the field could effectively relieve the increase of M.persicae populations in tobacco field.After releasing A.gifuensis by labour to control M.persicae, the proportion of individuals with aphids reduced to 3.5% from 14.4% before releasing, the average individual with aphids quantity of tobacco plant with aphids reduced to 104.0head /plant from 18.7 head /plant.By using A.gifuensis to control M.persicae, the decline rate of aphids was 74.82%, the control effect was 86.04%, aphid-transmitted virus was controlled very well, and the decline rate of disease index was 73.07%. Conclusion] A.gifuensis has significant effect to control M.persicae and aphid-transmitted virus, and can reduce cost .