病虫诊断
测报防控

Exchange professional skills
in plant protection.

植保技术交流
服务大众

Services to farmers.

病虫诊断
测报防控

Exchange professional skills
in plant protection.

植保技术交流
服务大众

Services to farmers.
发生在根茎基部或近地面处
全株系统发生，叶面绿色分布不均
主要发生在叶片上 病部可见霉状物
叶面无霉状物，病斑较小 人为因素引起的病变