三突花蛛对桃小叶蝉和桃粉蚜的选择效应研究

• 作 者: 朱承美 杨玉武 白世红 陈江林 邱培君 曲爱军
• 机 构: 山东农业大学职业技术学院!山东泰安271000,胜利油田石油管理局!山东东营257100,山东农业大学职业技术学院!山东泰安271000,山东农业大学职业技术学院!山东泰安271000,山东农业大学职
• 出 处: 林业科学研究
• 发表日期: 2000年04期
• 关键词: 叶蝉 三突花蛛 桃粉蚜 桃小叶蝉 捕食作用 选择指数 捕食率 捕食性天敌 喜好程度 选择效应

Misumenops tricuspidatus is a predator of Erythroneura sudra and Hyalopterus amygdali .Its selective coefficient varies with the amount change of these two pest populations.When the amount of both insect pest increase or the amount of E.sudra increases while H.amygdali keep unchanged, E.sudra is the priority to be caught.Only when the amount of H.amygdali increase while that of E.sudra keep unchanged and the ratio reached 20/10,the H.amygdali takes the precedence to be caught.

Misumenops tricuspidatus is a predator of Erythroneura sudra and Hyalopterus amygdali .Its selective coefficient varies with the amount change of these two pest populations. The amount of both insect pest increase or the amount of E.sudra increases while H. amygdali keep unchanged, E .sudra is the priority to be caught. Now when the amount of H.amygdali increase while that of E.sudra keep unchanged and the ratio reached 20/10, the H.amygdali takes the precedence to be caught.