麦无网长管蚜田间种群动态的研究

作者在田间系统调查的基础上对麦无网长管蚜空间分布格局，垂直分布动态和数量时序变化方面进行。组建了由气象因素和小麦生育期为自变量的数量预测模型。对三种主要麦蚜的空间生态位的定量计算，了解麦无网长管蚜，禾谷缢管蚜和麦长管蚜之间的种间竞争关系。用相关分析和通径分析方法寻找影响麦无网长管蚜种群消长的关键因子。认为该蚜在北京地区轻发生的原因是越冬虫源少和小麦生育阶段气温过高抑制作用所致。

STUDIES ON THE DYNAMICS OF FIELD POPULATION OF ROSE GRAIN APHID

Based on the systematic investigation in wheat fields,the dynamics of spatical patten,vertical distrioution and population of rose-grain aphid Metopolophium dirhodum (Walker) were studied. A predition model for population dynamics of this aphid, dependent oft some meteorological factors and Wheat stages;was developed, The interspecies competition relationship among M. dirhodnm,oat bird-cherry aphid Rhopaloslphum padi(L. ) and English grain aphid Sitobion ovenae (F. ) ,the three maih aphid pests on wheat, were explored by quantitative analysls of their spatial niches. The key facrors affeeting on the population dynamics of M. dirhodum were determined by correction analysis and path ahalysls. It was suggested that the reasons of the light occurence of this aphid in Beijing suburb are the rare overwintering aphid source and the highef temperature suppression in Wheat growing season.