作　　者： ; ; ; ;

机构地区： 西北大学

出　　处： 《西北农业大学学报》 1996年第1期45-49,共5页

摘　　要： 从研究油菜蚜虫种群生态位出发，探讨了田间混合蚜群的竞争共存机制，并将生态位理论应用于天敌控制效应的定量评估上。结果表明，随着时间的变化，甘兰蚜和萝卜蚜的激烈竞争主要集中表现在空间上的分化，田间群体状况表现出高度聚集特性；而桃蚜的空间分化并不明显，主要是累积为害。无敌的时间及空间跟随效应与控制潜能差异较大，以食蚜绒螨对桃蚜、蝇幼类对甘兰蚜和萝卜蚜的控制效应最高。 The mechanism of 3 species of coexisting rape aphids was inquired into,on the basis of studying their space and time niche,At the same time,the niche theorywas applied to quantitative evaluation of the control effect of natural enemies.The re-sults showed that the keen competition between cabbage aphid(Brevicoryne brassicaeL.)and mustard aphid(Lipaphis erysimi(Kaltebach)epitomized in spacial differentia-tion and the field colonies possessed the character of high gathering,but the spacial dif-ferentiation of green peach aphid(Myzus persicae(Sulzer)was not apparant.Its dam-age was the accumulated harm.The difference of natural enemiesl following effect andeontrol effect in time and space was obvious,of which the control effect of Allothronib-um SP.to green peach aphid,and of the larva of syrpid flies to cabbage aphid and mus-tard was the most effective.

关 键 词： 油菜 蚜虫 种群 天敌 生态位

领　　域： [农业科学] [农业科学]