释放中红侧沟茧蜂对玉米、辣椒田 棉铃虫的防治效果
Release of the parasitoid Microplitis mediator to control Helicoverpa armigera in corn and pepper fields
刘文旭 马爱红 路子云 冉红凡 李建成
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DOI：10.7679/j.issn.2095-1353.2018.006
作者单位：河北省农林科学院植物保护研究所，河北省农业有害生物综合防治工程技术研究中心， 农业部华北北部作物有害生物综合治理重点实验室，保定 071000
中文关键词：中红侧沟茧蜂，棉铃虫，释放，防治效果
英文关键词：Microplitis mediator, Helicoverpa armigera, field release, control efficiency
中文摘要：
【目的】 评价中红侧沟茧蜂Microplitis mediator在玉米和露地辣椒田释放对棉铃虫Helicoverpa armigera的防治效果。【方法】 在田间棉铃虫卵孵化盛期释放人工繁育的中红侧沟茧蜂，调查对棉铃虫幼虫的寄生率和田间防治效果。【结果】 中红侧沟茧蜂释放1次和2次对玉米田3代棉铃虫幼虫寄生率分别达到51.22%和60.35%，防治效果分别为68.42%和77.63%；在辣椒田中红侧沟茧蜂对2代棉铃虫幼虫的寄生率为65.68%-73.30%，防治效果可达到80%以上。【结论】 田间释放中红侧沟茧蜂对棉铃虫进行生物防治可作为玉米和辣椒田棉铃虫综防体系的一项主要措施。
英文摘要：
[Objectives] Field experiments and surveys were conducted to evaluate the efficacy of using the parasitoid Microplitis mediator to control Helicoverpa armigera in corn and pepper fields. [Methods] Mass reared M. mediator cocoons were released when eggs of H. armigera were at peak abundance in fields and the percentage of larvae parasitized and field control efficacy were determined. [Results] A single and repeated release of 7500 laboratory-reared M. mediator cocoons per hectare in cotton fields resulted in 51.22% and 60.35% parasitism of third generation H. armigera larvae, respectively and control efficiency of 68.42% and 77.63%, respectively. In pepper fields, parasitism of second generation H. armigera larvae ranged from 65.68% to 73.30%, and control efficiency was up to 80%. [Conclusion] The parasitoid M. mediator can be used as a biological control agent for H. armigera in the IPM of corn and pepper fields.