束管食螨瓢虫在柑桔树冠上分布的主分量分析  

PRINCIPAL COMPONENT ANATYSIS FOR THE SPATIAL PATTERN OF LADY BETTLE Stethorus chengi ON CITRUS TREE

作　　者：峗庆才 

机构地区：[1]西北农业大学植保系

出　　处：《西南农业大学学报（自然科学版）》1990年第5期513-515,共3页Journal of Southwest Agricultural University

基　　金：国家自然科学基金;西南农业大学青年科学基金

摘　　要：本文应用主分量分析方法对束管食螨瓢虫(Stethorus chengi)及其猎物桔全爪螨(Panongchus citri McG.)在柑桔树冠的分布与环境的关系进行了研究。结果表明,光照强度是影响食螨瓢虫及其猎物分布的最重要环境因子,占全部信息量的55.45%,并与食螨瓢虫和桔全爪螨的分布呈正相关。叶片含水量和叶温系数,分别占总信息量的11.17%和10.03%。Principal component analysis was used to detect the key factors affecting the distribution of lady bettle Stethorus chengi and its prey red spider mite on the periphery of a citrus tree. The results shows that sunlight is the most important factor affecting the distribution. The brighter the sunlight is, the more lady bettles and red spider mites exist. The second important factor is the capacity of water in leaves, occupying 11.17%. The third one is the temperature of leaves, occupying 10.03%.

关 键 词：柑桔 食螨瓢虫 树冠 分布 主分量 

分 类 号：S476.2[农业科学—农业昆虫与害虫防治]