摘要
采用m*－m方法分析了黑蚜小蜂的产卵频数分布，在25种密度组合下，产卵平均拥挤度m*的值从0．09（1：80）增加到2．96（9：5），并建立了m*与蜂蚧比、m*与平均密度m的回归模型。结果表明，松突圆蚧黑蚜小蜂产复寄生卵的程度与寄生蜂密度呈正相关，与寄主密度呈负相关，产卵呈随机分布。
The oviposition distribution of Aphytis sp. was analysed by m* - m method. The meancrowding of oviposition m* was from 0.09 (λ = 1:80) to 2.96 (λ = 9:5) (λ is the ratio of parasite toscale) among 25 combinations of parasite and scale densities. Then, two models were set up: m*-λmodel (m* = 0.6371 + 1 .7152λ. r = 0.90) and m-m model, The results sbowed that the degree ofsuperparasitism for aphytis sp. was positively relative to the density of parasite, but negativelyrelative to the density of host. Oviposition distribution was random.
出处
《昆虫知识》
CSCD
1995年第3期156-159,共4页
Entomological Knowledge
关键词
黑蚜小蜂
产卵分布
松突圆蚧
天敌
森林害虫
Aphytis sp., oviposition distribution, m~*-m method, Hemiberlesia pitysophila Takagi
