【作者】 苏建伟； 盛承发；

【Author】 SU Jian-Wei SHENG Cheng-Fa (Institute of Zoology, Chinese Academy of Sciences, Beijing 100080, China)

【机构】 中国科学院动物研究所；

【摘要】 研究了华北棉区捕食性天敌优势种叶色草蛉对棉田主要害虫棉蚜的捕食效应,主要结果如下:1)叶色草蛉幼虫对棉蚜的功能反应能用 Holling Ⅱ型方程很好地拟合;2)在较长的停食时间后,草蛉幼虫的瞬时攻击率下降,单头猎物的处置时间延长;3)在草蛉幼虫对自身密度的功能反应中,搜索常数和干扰常数随龄期增大而增大,同时也随猎物密度增大而增大;4)各个龄期的叶色草蛉幼虫对若蚜都有明显的选择倾向;5)提出了Cain选择指数的修正型.更多还原

【Abstract】 The predation efficiency of Chrysopa phyllochroma Wesmael was studied under laboratory condition at constant temperature, main results were as follows: 1) The functional response of the green lacewing to cotton aphid can be described by using Holling(1959)’s equation , the predation capacity was gradually increased with the growth of green lacewing under the condition of (26±0. 5)°C constant temperature. 2) The different condition of experiment will produce the different effects on the functional response, the attack rate (a) decreased after a long non-feeding peroid, in contrast, the handling time (Th) prolonged. 3) Mutual interference affected the predation effciency of green lacewing varied with the density of predators, the hunt constant (Q) and the parameter of mutual interference (m) increased with the growth age, as well as the prey density. 4) the selective predation of green lacewing larvae to nymph and adult of aphids, the green lacewing larvae shows positive preference to nymph, and negative preference to adult aphid. 5) The Cain’s selective index (Th) i rectified as-Where A is the selection coefficient of predator to the ith prey; N1, N2, N3……,and Nm arethe numbers of the various sorts of prey provided respectively; n1, n2, n3……, and nm arethe numbers of the various sorts of prey ingested respectively.更多还原