青岛市小麦纹枯病病原菌鉴定及其病害分析

摘要

Pathog en of wheat sharp eyespot was isolated and identified by tissue isolation, and its morphological characteristicsand rDNA-ITS were analyzed.The results showed that CAG-1(AG-D)fusion group of Rhizoctonia cerealis caused wheat sharp eyespot, which was firstly reported in Qingdao city. According to field investigation, causes of the disease outbreaks were analyzed. A management strategy was put forward such as improving ecological conditions of farmland on the basis,along with chemical control and disease resistant varieties application.%采用组织分离法对青岛地区小麦纹枯病病原菌进行了分离,结合菌物形态学特征、rDNA-ITS和特异性引物的PCR 扩增等分子检测对病原菌进行鉴定.结果表明,引起青岛地区小麦纹枯病的病原菌主要为禾谷丝核菌(Rhizoctonia cerealis)CAG-1(AG-D)融合群.据田间调查结果,分析了病害暴发的原因,提出了以改善农田生态条件为基础,结合药剂防治以及利用抗(耐)病品种的生产策略.