摘要
异色瓢虫是苹果绵蚜的主要捕食性天敢昆虫，其在苹果园的初发期在2—3月，高蜂期在3—4月。异色瓢虫在生草园的初发生期与高蜂期均比清耕园提前了半个月至1个月，且活动时间延长。研究表明，异色瓢虫成虫Harmonias axyridis（Pallas）对苹果绵蚜成虫Eriosoma lanigerum（Hausmann）的捕食功能反应符合HollingⅡ型，其模型是Na=1．3868N／（1＋0.01922N），捕食量随苹果绵蚜密度的增加而增加。异色瓢虫的日最大捕食量和最佳寻找密度分别为55．9头和22．5头，异色瓢虫干扰反应的数学模型为E=37．2P-0.1683。异色瓢虫的捕食量随温度的升高而增加。
Harmonias axyridis （Pallas） is one of important predatory natural insect for controlling Eriosoma lanlgerum in apple orchards. The date of begin occurrence and peak population were observed in between February and Maroh, between March and April,respectively. In cover crop orchards,the adult occurrence of H. axyridis was earlier one month or half month than in clean cultivated orchards,and last longer than in clean cultivated orchards. The functional response model of H. axyridis adults preyed on E.lanigenan（Hansmarm） was Na = 1. 3868N/（ 1 ＋ 0. 01922N）. Relationship between the amounts of woolly apple aphids preyed by the lady and aphid density showed a negative accelerative curve. The daily maximum number of aphid preyed theoretically and the optimum search density was 55.9 aphids and 22.5 aphids, respectively. The mutual interference among individual predators and preys could describe by Hassel and Vaeley＇ s equation was E = 37. 2P-0.1683. The relationship between the number of woolly apple aphids preyed by the lady and temperature showed a positive accelerative curve.
出处
《西南农业学报》
CSCD
2008年第4期1165-1168,共4页
Southwest China Journal of Agricultural Sciences
基金
云南省省院省校科技合作项目(2002FCBFB01K001)
关键词
异色瓢虫
苹果绵蚜
发生
捕食作用
Harmonias axyridis
Eriosoma lanlgerum
occurrence
predatory effect
