梨树锈病病斑在叶片上的空间分布型及抽样技术

摘要

Pear tree leaf samples with rust spot disease were collected in Changchun , Jilin Province .The spatial distribution of the pear rust spot is in a pattern of aggregated distribution and the basic component of distribution is in individual group. The field survey results show that under normal disease condition 1 600-2 600 leaf samples (1-5 rust spots per leaf) are required to analyze data with relatively high precision, and 200-300 leaf samples (1-5 rust spots per leaf) are required to analyze data with relatively low precision.The sequential sampling search table can be used to control the disease.%梨树锈病病斑在叶片上的空间分布型为聚集分布，分布的基本成分是个体群。梨树锈病的理论抽样数研究结果表明：获得较为精确的调查结果，在常见的发病条件下（每个叶片上的病斑数1～5个），需调查1600～2600个叶片；获得大体精确的调查结果，在常见的发病条件下（每个叶片上的病斑数1～5个），需调查200～300个叶片；制定了指导防治工作的序贯抽样检索表。