丽草蛉幼虫对草地贪夜蛾卵及低龄幼虫的捕食能力评价
文献类型: 中文期刊
关键词: 丽草蛉;;草地贪夜蛾;;捕食能力;;功能反应;;生物防治
期刊名称:植物保护
ISSN: 0529-1542
年卷期: 2020 年
页码:
收录情况: 北大核心(2020版) ; CSCD(2020-2021年度) ; 农林核心(2020版) ; 科技核心(2020版)
摘要: 为明确优良天敌丽草蛉对重大入侵害虫草地贪夜蛾的控害潜能,本研究测定了丽草蛉幼虫对草地贪夜蛾卵和低龄幼虫的捕食能力及其功能反应,观察并总结了其捕食行为特点。结果表明,丽草蛉 2 龄、 3 龄幼虫对草地贪夜蛾卵及 1~2 龄幼虫均具有较强的捕食能力,其 2 龄幼虫日均捕食猎物卵( 30.2±6.8)粒、 1 龄幼虫( 22.2±5.6)头, 3 龄幼虫对猎物 1 龄幼虫的捕食量最高,为( 66.8±13.3)头,其次是对卵和 2 龄幼虫,捕食量分别为( 46.2±8.9)粒和( 10.95±1.2)头。丽草蛉幼虫对不同虫态草地贪夜蛾的捕食量随猎物密度增加逐渐升高后趋于稳定,符合 Holling II 功能反应模型。 3 龄幼虫对草地贪夜蛾的搜寻处理能力、捕食速率及最大捕食量均显著优于 2 龄幼虫,控害效能更强。本研究结果为利用丽草蛉持续控制草地贪夜蛾提供了重要参考依据。
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