叉角厉蝽成虫对草地贪夜蛾幼虫的捕食作用研究
Journal of Mountain Agriculture and Biology(2020)
Abstract
叉角厉蝽是一种多食性的优势天敌,为系统评估叉角厉蝽对草地贪夜蛾的捕食能力,在室内条件下测试了叉角厉蝽雌、雄成虫对草地贪夜蛾3、4和5龄幼虫的捕食功能反应和种内干扰反应.结果表明:叉角厉蝽雌、雄成虫对草地贪夜蛾3、4和5龄的捕食功能反应均符合HollingⅡ方程,雌成虫对草地贪夜蛾3、4和5龄捕食功能反应方程分别为Na=1.1592N/(1+0.0194N),Na=0.61065N/(1+0.0124N),Na=0.7757N/(1+0.0529N);雄成虫对草地贪夜蛾3、4和5龄捕食功能反应方程分别为Na=0.9082N/(1+0.01771N),Na=0.4657N/(1+0.01304N),Na=0.93188N/(1+0.1765N).叉角厉蝽雌、雄成虫对草地贪夜蛾龄幼虫的寻找效应随着猎物密度的增加而下降.叉角厉蝽雌成虫对草地贪夜蛾的捕食作用率随着自身密度的增加而降低,其关系为E=0.3982P-0.3409.
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