蠋蝽对斜纹夜蛾幼虫的捕食作用研究

Qiang GAO,Di WANG, Wenhui ZHANG,Yuande LIU,Fanchao MENG,Bo WU,Zhigang WANG,Li LIU,Hao ZONG,Xiaolei TAN,Rui XU,Weina ZHANG

Chinese Tobacco Science（2019）

Cited 7|Views9

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Abstract

测定了蠋蝽在室内和田间对斜纹夜蛾幼虫的捕食能力.结果表明,蠋蝽成虫对斜纹夜蛾1~2龄幼虫的捕食能力最强;随着斜纹夜蛾幼虫龄期的增长,蠋蝽对其捕食能力逐渐降低;蠋蝽3龄若虫捕食量小于成虫和5龄若虫.当蠋蝽与斜纹夜蛾数量比为 1:15 时,蠋蝽成虫的平均单头捕食量和捕食率最高;随着密度增加,蠋蝽的捕食量趋于稳定.田间试验表明,蠋蝽对斜纹夜蛾幼虫有很好的控制作用,随着处理时间的延长,虫口减退率逐渐提高,15 d后虫口减退率趋于稳定.

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