棉田优势天敌多异瓢虫成虫对棉蚜捕食功能的研究

Study on predation of Aphis gossypii by adult Hippodamia variegata

多异瓢虫成虫对棉蚜的捕食功能符合HollingⅡ模型,日最大捕食量为172.6头棉蚜,捕食一头棉蚜需要3.34min,功能系数为1.575;多异瓢虫个体间相互干扰对捕食效应的影响可以用E=0.9795P-1.016模拟;多异瓢虫对自身密度的功能反应可以用A=103.55P-0.6305模拟。

rFne functional response of adult Hippodamia variegata Goeze to Aphis gossypii Glover was fit for Holling Ⅱ model. The daily biggest predational number is 172.6 head of Aphis gossypii. It tooks 3.34 minutes to eat a head of Aphis gossypii, functional coefficient was 1. 575; The relationship between predation efficiency and individual interference could be fit for Hassell and Varley model E = 0.979 5P^-1.016; The functional response of adult Hippodamia variegata Goeze to the density of itself could be fit for Watt model A = 103.55P^-0.6305.