浙江省猕猴桃溃疡病发病现状调查及影响因子分析

通过对浙江省5个猕猴桃主产区（江山、泰顺、宁海、上虞和桐乡）10个乡村30个猕猴桃园的猕猴桃溃疡病发病特点的调查分析，初步探明猕猴桃溃疡病发病程度与栽培品种密切相关，在红阳、布鲁诺、徐香、华特和金丰5个调查品种中，红阳最易感病，其定植后第二年的发病率有的猕猴桃园达100%。随着树龄的增大、树势的衰弱，溃疡病危害逐渐加重；相同树龄果园，负载量大的则树势较差，其发病率亦高。至一定海拔高度后，猕猴桃溃疡病的发病率和病情指数随着海拔高度的上升而增长，而对于同海拔果园，其发病率和病情指数在向阳坡与背阳坡之间均存在极显著差异。发生猕猴桃溃疡病的严重程度因产区不同而有一定差异，除了气象因子不尽相同之外，管理水平、排灌能力和立地条件等均为影响溃疡病发生的重要因素。

Investigation and analysis of infection caused by Pseudomonas syringae pv.Actinidiae and its affecting factors in Zhejiang province

The factors which lead to kiwifruit bacterial canker were investigated in 30 orchards of 10 villages in 5 major kiwifruit producing regions( Jiangshan， Shangyu， Taishun， Ninghai， Tongxiang） in Zhejiang province.The main results were as follows: Through the analysis of the features of Pseudomonas syringae pv. Actinidiae（Psa）， there was a close relation between the variety and the degree of the disease. Among the 5 varieties （Hongyang， Bruno， Xuxiang， White and Jinfeng）， Hongyang was most susceptible to Psa， which was infected 100% pathogenicity in some orchards in the second year after field planting. In addition， as age increases and tree vigor decreases， the percent of the disease showed a rising trend. The trees with large capacity among the same age orchards had lower tree vigor and higher disease incidence rate. The disease incidence rate and disease index， in which there were significant differences between sunny slope and shady slope at the same altitude， increased with altitude increasing to a certain degree. And different regions had different disease degrees. The site condition, management and irrigation affected the degree of the disease obviously except the meteorological factors of the fields.