七星瓢虫与异色瓢虫对桃蚜的种间竞争研究  

Study on interspecies competition between Coccinella septempunctata and Leis axyridis against Myzus persicae

作　　者：刘军和[1,2] 贺达汉[1] 

机构地区：[1]宁夏大学农学院,宁夏银川750001 [2]黄淮学院,河南驻马店463000

出　　处：《中国植保导刊》2008年第6期9-12,共4页China Plant Protection

基　　金：国家科技支撑计划(2007BAO57B02);驻马店科技攻关计划(0610007)

摘　　要：通过单独饲养和混合饲养,研究了种间竞争对七星瓢虫和异色瓢虫种群数量增长的影响,并用Lotka-Volterra种间竞争模型对两种瓢虫在猎物相对充足与不足条件下的种间竞争进行模拟。结果表明,单独饲养时,异色瓢虫的种群增长数量大于七星瓢虫;混合饲养时,七星瓢虫的种群增长数量在猎物相对充足时大于异色瓢虫,而猎物相对不足时,七星瓢虫的种群增长数量小于异色瓢虫。在两种瓢虫的种间竞争中,异色瓢虫相对占优势,竞争的结局是二者可以形成一个稳定的平衡局面而得以共存。Under the condition of single rearing and mixed rearing, the influence of interspecies competition on population growth of Coccinella septempunctata and Leis axyridis were studied. Lotka-Volterra equation was used to simulate the competition when more preys or less preys were provided for the two ladybirds. The results indicated that population growth of L. axyridis was larger than that of C. septempunctata under the condition of single rearing or less preys, and population growth of C. septempunctata was larger than that of L. axyridis under the condition of mixed rearing and more preys. In the population competition of the two ladybirds, L. axyridis was relatively dominant. The competition ended up in a stable, equilibrant and co-existing situation for the two ladybirds.

关 键 词：七星瓢虫 异色瓢虫 桃蚜 混合饲养 种间竞争 种群 

分 类 号：S476.2[农业科学—农业昆虫与害虫防治] S436.621[农业科学—植物保护]