田间七星瓢虫成幼虫捕食3种蚜虫功能反应初步研究

Functional Responses of Coccinella Septempunctata Larval for the Predation of Three Species of Aphids in the Field

通过创新捕食者对猎物(捕食对象)的捕食功能研究方法,提高生物防治准确性和实效性。用纱袋笼罩法在麦田、棉田和萝卜田对七星瓢虫成虫和四龄幼虫捕食麦长管蚜、棉蚜、萝卜蚜功能反应进行了初步研究,并分别建立了七星瓢虫成虫和四龄幼虫对各蚜类的田间捕食功能反应数学模型。结果表明,与室内罐头瓶内试验结果基本一致,但捕食功能强弱存有5%左右的小幅差异,田间七星瓢虫成虫对麦长管蚜捕食功能有所增强,而其成虫和四龄幼虫对棉蚜和萝卜蚜捕食功能有所减弱,可能是田间小气候影响所致。对猎物捕食,无论田间或室内,都存在抢食或补食现象。两种试验方法相辅相成、相互验证和矫正,可提高指导性和生防效果。

By means of the study of innovation of predators to prey（ prey） predation function method, improve the accuracy and effectiveness of biological control Methods.Yarn bag hanging method in wheat, cotton and radish field on Coccinella septempunctata adults and four instar larvae prey on wheat aphid, Aphis gossypii, Turnip aphid functional response was studied, And adult Coccinella and four instar larvae of the aphid predator functional response class field mathematical model were respectively established. And interior preserving jar test results were basically the same, but the functional strength had about 5% small differences, the field of adult Coccinella on wheat aphid predator function had improved, and the adults and the four instar larvae of cotton aphid and turnip aphid predator had been weakened, may be the field microclimate effects induced by. For prey capture, regardless of the field or laboratory,there are snatch or ofladybugs phenomenon.Two kinds of test methods complement each other, mutual validation and correction, to improve the accuracy and efficiency of biological control has realistic significance, mutual verification and correction.