进入深秋时节,越冬茬黄瓜纷纷定植到棚室中。深秋昼夜温差较大,露水重,随着气温的下降,白天拉开棚膜放风和降温,夜间需要关闭封口保温,这样的生长环境非常适合霜霉病和白粉病的发生,菜农应注意防治。1.霜霉病。黄瓜全生育期均可以感染此病,主要危害 Into the late autumn season, overwintering cucumbers have planted to the studio. The temperature difference between day and night in late autumn is relatively large, with heavy dew. As the temperature drops, the greenhouse film is released during the day and cooled. The environment needs to be sealed and closed at night. This growth environment is very suitable for the occurrence of downy mildew and powdery mildew. Downy mildew Cucumber whole growth period can be infected with the disease, the main hazard