猎物条件对七星瓢虫(Coccinella septempunctata L.)捕食作用的影响

THE EFFECT OF DIFFERENT PREYS ON PREDATION OF SEVEN SPOTTED LADYBIRD BEETLE(CQCCINELLA SEPTEMPUNCTATA)

研究表明不同猎物种类对七星瓢虫(Coccinella septempunctata)的捕食作用具有不同的影响.七星瓢虫捕食效率对桃纵卷叶蚜(Myzus tropicalis)密度的依赖性较大,对苹果绵蚜(Eriosoma lanigerum)的依赖性较小,七星瓢虫—苹果绵蚜系统中,七星瓢虫自身密度的干扰作用较大,七星瓢虫—蒿蚜系统中的干扰作用较小.研究天敌昆虫对其不同猎物的捕食作用,对于认识物种之间的协同进化以及正确指导生物防治工作的开展具有重要意义.

Study showed that the different preys had variant effect on the predation of seven spotted lady beetle(Coccinella septempunctata).Under laboratory conditio- ns,the predation efficency of Coccinella septempunctata relied more on the popul- ation density of Myzus tropicalis,and less on the Eriosoms lanigerum.In Coc- cinella septempunctata-Eriosoma lanigerum system,the density of Coccinella sept- empunctata has greater interference effect on its own predation than in Coccinella septempunctato-Macrosiphoniella sp.system.These results have great significance to understand the co-evolution effect of predators and its preys.