摘要
本文用平均密度 ( x)、聚块性指标 (m /m)、有虫率 ( % )进行模糊聚类 ,对黑绒鳃金龟种群动态进行了分析。从聚类分析中可以看出黑绒鳃金龟种群在时间序列上亲疏关系的动态特征 ,可划分为 4个状态集。防治重点要放在迁入被害田时期 (A2 ) ,以达到经济。
Applying fuzzy clustering analysis to the population dynamics of Maladera orientalis (Motsh.), the results showed that the population of this pest had the dynamic characterishics of close-distant relations in time sequcence, and can be divided into four state sets. The authors indicated that with economically and effectively controlling the pest, the controlling emphasis was layed in the immigrated period of destructed fields(A 2).
出处
《宁夏农学院学报》
2001年第2期11-13,共3页
Journal of Ningxia Agricultural College
