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在秋季蔬菜生长季节里,常遭受各种病虫的危害,如不及时防治,往往造成大量减产。因此,掌握病虫害的发生时期,抓好病虫害的防治,是保证秋菜苗全、苗壮,增产丰收的一项重要措施。 一、发生特点 1.病害方面:有病毒病、霜霉病和软腐病。过去以软腐病危害较重,近几年来,病毒病、霜霉病的危害也日趋严重起来。①病毒病。对十字花科蔬菜都可发生危害,但以
In the growing season of vegetables in autumn, they are often endangered by various pests and diseases. If they are not controlled in time, they often result in mass production cuts. Therefore, grasping the occurrence of pests and diseases, do a good job in the prevention and treatment of pests and diseases, is to ensure autumn seedlings full, Miao Zhuang, an important measure to increase harvest. First, the occurrence of characteristics 1. Diseases: a viral disease, downy mildew and soft rot disease. In the past, the disease was severely endangered by soft rot. In recent years, the hazards of virus diseases and downy mildew have also become increasingly serious. ① virus disease. Cruciferous vegetables can be harmful, but to