取食阶段和食物类型对大草蛉幼虫发育的影响  

Effects of Feeding Stage and Food Type on Developmental Parameters of Chrysopa pallens( Neuroptera: Chrysopidae)

作　　者：阿力甫.那思尔 孟玲[2] 李保平[2] 

机构地区：[1]新疆师范大学生命科学学院,新疆乌鲁木齐830054 [2]南京农业大学植物保护学院农作物生物灾害综合治理教育部重点实验室,江苏南京210095

出　　处：《干旱区研究》2016年第5期1043-1045,共3页Arid Zone Research

基　　金：国家自然科学基金(30960055);国家公益性行业(农业)科研专项(201103032)共同资助

摘　　要：集团内捕食是食蚜天敌群落中常见的现象,而捕食性昆虫卵通常成为集团内的猎物。为探究新疆农田生态系统中捕食性昆虫集团内捕食的规律,以大草蛉(Chrysopa pallens)为对象,设置不同幼虫期(整个幼虫期、刚蜕皮的4龄幼虫)和食物类型〔七星瓢虫(Cocinellina septempuntata)卵、棉蚜(Aphis gossypii)+七星瓢虫卵、棉蚜〕等2因素3水平的析因实验设计处理,观察比较大草蛉发育、存活参数。结果表明:食物类型与饲喂期存在显著互作,影响大草蛉幼虫发育至成虫的存活概率,即食物类型的影响程度取决于饲喂期的长短,虽然在整个幼虫期和4龄幼虫期处理下,存活率在"棉蚜"与"瓢虫卵+棉蚜"处理之间没有差异,但大于"瓢虫卵"处理下的存活率,但差异幅度不同:"整个幼虫饲喂"处理下的存活率大于"4龄期饲喂"处理。说明干旱环境中大草蛉幼虫无论早晚只捕食七星瓢虫卵均难以正常发育存活至成虫。Intra-guild predation is widespread in the aphid natural enemy communities, and the eggs are mostly the intra-guild prey. When and what kinds of food is influential on the larval growth until imagoes of Chrysopa pallens from crop fields in arid ecosystems in Xinjiang were investigated, and the growth and survival parameters of C. pallens were observed and compared based on the different larval stages （ from neonate to the 4th instar） and the different kinds of food （ cotton aphids, cotton aphids plus 7-spot ladybird Cocinellina septempuntata eggs, and 7-spot ladybirds＇ eggs. The results showed that there was a significant interaction between foot kinds and feeding stages. Survival of C. pallens from the larval stage to the imago stage performed a similar pattern, and it was higher when fed with＂ aphids＂ and ＂aphids plus 7-spot ladybird eggs＂ than with＂7-spot ladybird eggs＂. The survival rate was lower with feeding stage treatments from neonate than from the 4th instar larvae. The results of this study suggested that it was difficult to accomplish the growth of C. pallens larvae either from neonate stage or imago stage by feeding with C. septempuntata eggs only.

关 键 词：大草蛉 幼虫发育 七星瓢虫 种群动态 生物防治 

分 类 号：S476[农业科学—农业昆虫与害虫防治]