瓢虫柄腹姬小蜂对茄二十八星瓢虫功能反应的研究  

Functional responses of Pediobius foveolatus to Henosepilachna vigintioctopunctata

作　　者：王国红[1] 涂小云[2] 

机构地区：[1]福建师范大学生物工程学院,福州350007 [2]江西师范大学生命科学学院,南昌330027

出　　处：《生态学杂志》2005年第7期736-740,共5页Chinese Journal of Ecology

基　　金：江西省自然基金资助项目(9930027)。

摘　　要：研究了瓢虫柄腹姬小蜂功能反应。结果表明,在供试温度下,瓢虫柄腹姬小蜂对茄二十八星瓢虫的功能反应均符合Holling圆盘方程Ⅱ型,以25℃下的搜寻效率最高,其模型为Na=1.94N/(1+0.39N)。在茄枝叶、龙葵枝叶、酸酱枝叶和西红柿枝叶4种叶片上,以茄枝叶、龙葵枝叶上的搜寻效率最高,分别为1.85和1.94。瓢虫柄腹姬小蜂对不同密度的2、3、4龄幼虫的功能反应,以4龄的搜寻效率最高,其次为3龄,最低为2龄,实验中未发现瓢虫柄腹姬小蜂寄生1龄的幼虫。不同处理方法、不同药剂影响瓢虫柄腹姬小蜂对不同寄主密度的功能反应,其中阿维菌素组的搜寻效率与对照组没有显著性差异,苦皮藤素组的搜寻效率稍有降低,而敌敌畏、氯氰菊酯处理组的搜寻效率显著下降,处理时间相对延长。Functional responses of Pediobius foveolatus to Henosepilachna vigintioctopunctata were studied in this paper.The results showed that the functional responses of P.foveolatus to host larval density of H.vigintioctopunctata could be described very well by Holling disc equation Ⅱ at all test temperatures.The maximum values of searching rate of Pediobius foveolatus to H.vigintioctopunctata in Solanum melongena groups and Solanum nigrum groups were 1.85 and 1.94,respectively.On the branches of Solanum melongena,Solanum nigrum,Physalis alkekengi var.francletii and Lycopersicon esculentum,the maximum interfering coefficients in the groups of Physalis alkekengi var.francletii and L.esculentum were 0.50 and 0.28,respectively.P.foveolatus did not parasized the 1^(st) lavae,the values of searching rate in the 4^(th) group were the maximum,followed by the 3^(rd) and 2^(nd) groups.The searching rate in the Avermectin group was the maximum,followed by the Bt and Celangulin groups.The searching rates in Dichlorovos and Cypermethrin groups decreased sharply compared with the others,while the handling time increased relatively.

关 键 词：瓢虫柄腹姬小蜂 功能反应 茄二十八星瓢虫 

分 类 号：S476.3[农业科学—农业昆虫与害虫防治]