芦笋茎枯病田间分布型的研究及其应用  

Studies on The Filed Distribution Pattern of Phoma Asparagi Sacc. and its Application

作　　者：常彭阳 

机构地区：[1]江西省临川县农业局

出　　处：《江西农业学报》1991年第2期112-116,共5页Acta Agriculturae Jiangxi

摘　　要：本研究通过在笋园周年定点系统调查,并用频次分布、扩散系数C、扩散型指数I_δ、聚集指标I、Ca值和平均拥挤度与平均数的比值x/x等6种方法进行田间分布型分析检验。检验结果表明,芦笋茎枯病在周年流行过程中,其田间分布型发生动态变化。流行前期呈聚集分布,中期呈随机分布,后期呈均匀分布。5种抽样方法比较结果,双线平行和棋盘式抽样方法比较合适。本文还讨论了不同发病率条件下的理论抽样数。It is quite essential to clarify the field distribution pattern and sampling technique of stem blight of asparagus in order to explore its epidemiology and to improve its forecast effect and management. In the present study, six methods were used to test the distribution pattern of the stem blight in fields. The results showed that the distribution pattern varied in annual prevalence. In the early stage, it belonged to an aggregated distribution, but showed a random distribution in the middle stage and an even distribution in the late stage. The comparison among five sampling methods used showed that two methods, two - line parallele and chessboard form were suitale for the disease sampling. In the end of paper, a series of theoretical sampling number under different incidenece was also discussed.

关 键 词：芦笋茎枯病 田间分布型 抽样技术 

分 类 号：S436.44[农业科学—农业昆虫与害虫防治]