论文部分内容阅读
本文从室内和田间两方面评估了牧草盲蝽对棉蚜的捕食作用。室内研究发现,不同虫态的牧草盲蝽对棉蚜的捕食功能反应均符合HollingⅡ型方程;捕食量随棉蚜密度的增加而增大,也随着自身龄期的增大而增大;4龄若虫、雌成虫与雄成虫三者间的捕食量没有明显差异,但均显著高于2龄若虫。田间罩笼试验同样表明,牧草盲蝽对棉蚜具有一定的捕食作用。
In this paper, the predation of Lygus herba on cotton aphid was evaluated both indoors and in the field. In laboratory studies, it was found that the predation functional response of Lygus nudus to the cotton aphid accorded with the Holling type II equation. The predation amount increased with the increase of the density of cotton aphid and also increased with the increase of its own age.4 There was no significant difference in the predation among the three instar nymphs, female adults and male adults, but they were significantly higher than those of the second instar nymphs. Field cage test also showed that the herbage Lygus aphid has a certain predation.