【摘要】 【目的】为绿色防控稻纵卷叶螟,减少化学农药用量提供理论依据。【方法】设放蜂一区、放蜂二区,田间人工释放6000头/667m2、9600头/667m2两种不同螟黄赤眼蜂蜂量,并设对照区,各区试验期间不施用任何化肥、农药;调查放蜂前后稻纵卷叶螟螟卵发生情况,计算防治效果。【结果】释放螟黄赤眼蜂6000头/667m2、9600头/667m2对稻纵卷叶螟具有较好的防治效果,螟卵寄生率分别为10.34%、38.60%、卷叶率控制在7.33%、4.92%,防治效果达77.26%、84.5%。对照区螟卵粒寄生率变化不大。【结论】放蜂后放蜂区稻纵卷叶螟卵粒寄生率明显提高,释放螟黄赤眼蜂对稻纵卷叶螟具有较好防治效果,释放蜂量越大,效果越好;把握螟蛾始盛期的最佳放蜂时期,使蜂卵相遇,达到最好的寄生效果。更多还原

【Abstract】 【Objective】In order to provide the reference for Cnaphalocrocis medialis biological controlling and reduce pesticides usage; 【Method】The biological control experiment of releasing wasp(Trichogramma Chilonis) to control rice leaf folder(Cnaphalocrocis medialis Guenee) was implemented around Guangxi. Two wasps releasing density of 6000/667m2 and 9600/667m2 were set in field respectively.【Results】The results show a significant control efficiency in both releasing density. Their parasitism rate on leaf folder egg are10.34% and 38.60%; and rice leaf damage rate is control under 7.33% and 4.92%. The control efficiency rate reaches 77.26% and 84.5% high respectively.【Conclusion】Rice leaf folder control by releasing Tirchogramma Chilonis has achieved good effect, the more the number, the better of controlling.更多还原