桑瘿蚊幼虫的空间分布参数特征及其应用

THE CHARACTERUSTUCS ANDITS APPLICATION OF SPATIALDISTRIBUTION PARAMETERS OF THE LARVAE OFMULBERRY SHOOT GALL-MIDGE(DIPLOSIS MORIYOKOYAAMA)

利用桑瘿蚊的空间分布参数ｍ．ｋ．α．β．ｂ值，确定桑瘿蚊幼虫属聚集分布，其原因主要是由于本身的聚集习性引起的，同时根据Ｉｗａｏ模型进行了资料代换。采用Ｉｗａｏ法，Ｔａｙｌｏｒ幂法则及ｓｏｕｔｈｗｏｏｄ．公共值Ｋｃ的理论抽样模式得出在不同密度（ｘ）和不同精度（Ｄ）要求下的理论抽样数。应用ｋｕｎｏ模型探讨了序贯抽样方法。

The research results show that the larva distribution of mulberry shoot gall-midge(Diplosis mori Yokoyama)belongs to the aggregate distribution,by way of thespatial distribution parameter's value of m￣*,k,α,β and b,and this Phenomenon is caused bytheir aggregate habits.In the meantime,the data is substituted according to Iwao Pattern.This research results also demonstrate the theoritical sampling mode under the requireof different density and precision by adopting Iwao method, Taylor power rule and commonvalue Kc of Southwood method. Besides,this research probes into sequential sampling planby Kuno mode.