作　　者： ; ;

机构地区： 广西农业科学院

出　　处： 《广西农业科学》 2007年第3期275-278,共4页

摘　　要： 运用5种聚集度指标和2种回归分析方法对甘蓝地3种主要害虫的空间分布型和抽样技术进行研究,结果表明,白粉虱、桃蚜与小菜蛾幼虫在一定密度下均呈聚集分布,分布的基本成分是个体群,且个体间相互吸引;并运用Iw ao'sM*-M回归中的两个参数α和β值确定了不同虫口密度下的最适抽样数模型,为这几种害虫的种群系统研究奠定了良好的基础。 The spatial distribution pattern and sampling technology of three major pests including Bemisia tabaci （Gennadius）, Myzus persicae （Sulzer） and Plutella xylostella in the cabbage fields were analyzed with five aggregation indexes and two regression analysis methods such as Taylor＇s power law and Iwao＇s distribution function. The results showed that the spatial distribution pattern of the larvae of B. tabaci , M. persicae and P. xylostella was of aggregated, and the basic component of the distribution was individual colony with an attractive interaction on individual colony. By using the parameters αand β in Iwao＇s M＇-M regression equation, the model of optimal sampling numbers determined under different population density, and it will provide better basis for studying the population system of the pests.

关 键 词： 甘蓝 害虫 空间分布型

领　　域： [农业科学] [农业科学]