十三星瓢虫和龟纹瓢虫对萝卜蚜的捕食反应

对十三星瓢虫Hippodamia tredecimpunctata和龟纹瓢虫Propylea japonica的雌雄成虫对萝卜蚜Li-paphis erysimi的捕食作用及其相互之间的干扰反应进行了初步研究.结果表明:2种瓢虫的雌、雄成虫对萝卜蚜的捕食反应均符合HollingⅡ型圆盘方程,十三星瓢虫雌、雄虫理论方程分别为:Na=1.090 8 N/(1+0.005 2 N),Na=1.124 9 N/(1+0.006 0 N),最大捕食量分别为196.078 4、181.818 2;龟纹瓢虫雌、雄虫理论方程分别为:Na=1.126 4 N/(1+0.006 7 N),Na=1.176 6 N/(1+0.008 7 N),最大捕食量分别为166.666 7、136.986 3.2种瓢虫的捕食能力随自身密度的增加而下降,相互之间存在干扰,符合Hassell模型.

Functional response of Hippodamia tredecimpunctata and Propylea japonica to Lipaphis erysimi

The predation function of Hippodamia tredecimpunctata and Propylea japonica to Lipaphis erysimi and with each other interference were studied.The functional response was analyzed by HollingⅡ's disc equation.The theoretical qauation of male and female adult of Hippodamia tredecimpunctata were Na=1.124 9 N/(1+0.006 0 N),Na=1.124 9 N/(1+0.006 0 N),and the most consuming quantity were 196.078 and 181.818.The theoretical equation of male and female adult of Propylea japonica were Na=1.126 4 N/(1+0.006 7 N),Na=1.176 6 N/(1+0.008 7 N),the most consuming quantity were166.666 7 and 136.986 3,respectively.The predation amount of these two natural enemies was increased with the increase of population density of Lipaphis erysimi,and decreased with the increase of their own density,the model belonged to the type of HasseII.