杨树食叶害虫杨舟蛾生物控制技术研究及应用

Studies on the technology of biological control to the defoliator of the poplars and its demonstration

通过高效绿僵菌、Bt菌株筛选和周氏啮小蜂、赤眼蜂规模化繁育及其施放技术等研究,构建了一套杨树食叶害虫防治专家系统,并在江苏省宝应等县通过1.4万hm2杨树舟蛾发生区的生物治理示范,3 a分别用生物制剂应急治理66.67,333.33 hm2,其余林分通过释放赤眼蜂、周氏啮小蜂等天敌和林农复合经营等措施控制危害,控制杨小舟蛾、杨扇舟蛾的效果为95%~100%,对大面积示范区维持低虫口密度起到了关键作用。在生产上选择以释放周氏啮小蜂或赤眼蜂30.0万头/hm2防治杨小舟蛾或杨扇舟蛾,可有效控制林间舟蛾的虫口密度,实现了高效、无公害、可持续治理的目标。

By the introduction and screening of high efficient Metarhizium anisopliae, Bacillus thuringiensis （Bt） strain, and studying the massive breeding and large-scaled releasing technology of Chouioia cunea and Trichogramma closterae ,we con- structed a set of early warning system of defoliator of the poplars control, In the 14 000 hm2 of biological control demonstra- tion area in Baoying County, the area of emergency treatmant with biological preparation of Bt and chlorbenzuron were 66. 67, 333.33 hm2 respectively during 2009 and 2010. In the rest of the stands, by releasing 0.30 million per hm2 of T. Closterae or C. cunea and agroforestry system measures to control the damage, we gained the control effects up to 95% 100% on the larvae of Clostera anachoreta or Micromelalopha troglodyte , playing a key role for large scale demonstration zone to maintain a low insect mouth density. The population density was greatly reduced and the targets of high efficiency, non pollution and sustainable management were achieved.