避难所对七星瓢虫捕食桃蚜功能反应的影响  

Effect of refugia on the functional response of Coccinella septempunctata feeding on Myzus persicae

作　　者：王珏[1] 原国辉[1] 游秀峰[1] 李慧玲[1] 孙淑君[1] 李为争[1] 

机构地区：[1]河南农业大学植物保护学院,郑州450002

出　　处：《应用昆虫学报》2013年第4期942-950,共9页Chinese Journal of Applied Entomology

基　　金：河南省教育厅科学技术研究重点项目(12A210012);公益性行业(农业)科研专项(201203036)

摘　　要：自然情况下的捕食是以植物为中介发生的。作者采用植物模型作为捕食环境,测试了单纯的物理因素(避难所)对七星瓢虫Coccinella septempunctata L.捕食桃蚜Myzus persicae(Sulzer)的功能反应的影响。结果表明,避难所的存在能造成七星瓢虫捕食量和捕食率极显著下降,对雄虫的影响显著比雌虫强,且在中等猎物密度时影响更为突出。Logistic回归分析发现,七星瓢虫雌虫和雄虫无论避难所是否存在,功能反应类型均为HollingⅡ型。避难所不存在的情况下,雌、雄成虫的圆盘方程分别为N a=1.0259 N0/(1+0.003078 N0)和N a=0.9246 N0/(1+0.002127 N0),避难所存在的情况下,其圆盘方程分别为N a=0.9500 N0/(1+0.00342 N0)和N a=0.6463N0/(1+0.002262 N0)。避难所的存在能导致两性成虫瞬时攻击率极显著下降,但仅雄虫处置时间极显著延长,说明雄虫在环境异质性较高时捕获猎物更困难。The effect of pure physical factors （ prey refugia） on the functional response of Coccinella septempunctata L. feeding on Myzus persicae （Sulzer） was investigated using artificial plants in the field. The results show that the presence of prey refugia caused a dramatic decrease in prey consumption and predation rate, and that this effect was more marked with respect to male C. septempunctata than females. This refuge effect was maximal at moderate prey densities. Logistic regression indicates that the presence of refugia did not alter the type of functional response. In the absence of refugia, the Holling disc equations of females and males were Na = 1.0259 N0 /（1 ＋ 0.003078 N0）and Na = 0.9246 N0 /（1 ＋ 0.002127 N0）, respectively, compared to Na = 0. 9500 N0/（ 1 ＋ 0. 00342 No ） and Na = 0. 6463 No/（ 1 ＋ 0. 002262 N0） respectively in the presence of refugia. The provision of refugia caused a significant decrease in the instantaneous attack rates of both sexes but only the prey handling time of males was significantly prolonged. These results suggest that male predatory coccinellids find it more difficult to capture prey in complex habitats than females.

关 键 词：七星瓢虫 桃蚜 避难所 功能反应 Holling圆盘方程 随机捕食方程 

分 类 号：S476.2[农业科学—农业昆虫与害虫防治]