四川省玉米弯孢菌叶斑病发生情况调查及分析

Investigation and Analysis on Maize Curvularia Leaf Spot in Sichuan

田间调查表明 ,玉米弯孢菌叶斑病可随种子远距离传播 ,玉米品种间感病性有差异 ,病残组织可在四川省田间自然越冬 ,多雨、高温、高湿有利于病害发生。玉米于苗期即可发病 ,穗期病情达到最高峰 ,成熟期病情趋于稳定。

According to the investigation, the agent of maize Curvularia leaf spot could be spread far away by seed. The differences of susceptibility appeared among different varieties of maize. The pathogen overwinter naturally on diseased materials. The raininess, high temperature and high humidity are propitious to the disease occurrence. The symptoms of this disease appear at the seedling stage and get epidemic at earing stage, then become stable in autumn.