林间蚜虫3种天敌间竞争干扰的研究

摘要/Abstract

摘要： 摘要：采用培养皿和纱笼饲养两种方法，研究了在林间捕食蚜虫的3种天敌：异色瓢虫、龟纹瓢虫、大草蛉之间相互竞争干扰作用，结果表明，3种幼虫在空间狭小的培养皿中，出现相互残杀现象，低龄期大草蛉幼虫和异色瓢虫幼虫存活率较高，都可捕杀龟纹瓢虫幼虫，中龄之后的大草蛉幼虫竞争优势明显，捕杀瓢虫幼虫。在空间相对较大的纱笼中，食物充足时，大草蛉幼虫和异色瓢虫幼虫存活率均较高，龟纹瓢虫幼虫存活率随虫龄增加而增加；食物不足时大草蛉幼虫存活率较高，异色瓢虫幼虫和龟纹瓢虫幼虫存活较低。对成虫间竞争干扰的研究表明，3种天敌成虫在共同捕食中，龟纹瓢虫寻找猎物时间最短，大草蛉最长。异色瓢虫受干扰最小、捕食的蚜虫数量最多，异色瓢虫成虫优势明显大于龟纹瓢虫和大草蛉。

关键词: 绿芦笋, 绿芦笋, 安全生产, 研究

Abstract: Abstract: Under the condition of culture dishes rearing and gauze-cage rearing, the influence of interspecies competition on Leis axyridis, Propylaea japonica (Thungberg) and Chrysopa pallens ,which were three kinds of predatory natural enemies of aphids in forest field were studied. The results indicated that three kinds of larvae killed each other in the Petri dish space, the 1st instar larvae of L. axyridis and C. pallens were higher survival rate, and they could prey on P. japonica larvae. After 2nd instar larvae of L. axyridis was relatively dominant, which preyed on other two kind of larvae. In contrast, relatively large space with a gauze-cage, L. axyridis larvae and C. pallens larvae were relatively higher survival rate under the condition of more preys, P. japonica larvae was increased with age. Yet, C. pallens had higher survival rate under the condition of less preys, others were lower. Based on the research of adult stage, it showed that P. japonica taken prey in the shortest time under a common place, but C. pallens taken the longest time. Minimal disruption to L. axyridis, it preyed largest number of aphids, obviously, compared with other two kinds of adult stage, L. axyridis was dominant species.

李慧仁,迟德富,李晓灿,宇佳,赵洪云. 林间蚜虫3种天敌间竞争干扰的研究[J]. 中国农学通报, 2009, 25(11): 145-150.

Li Huiren, Chi Defu, Li Xiaocan, Yu Jia, Zhao Hongyun. Study on interspecies competition of three kinds of natural enemies of aphids in forest field[J]. Chinese Agricultural Science Bulletin, 2009, 25(11): 145-150.

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