黄瓜霜霉病是一种毁灭性的病害，以往多采取代学药车1保护，防效不甚理想。为有效控制其危害，应采取多种防治措施相结合，才能收到良好的效果。1．县田间间选择晴好的天气，先在棚内洗足水，然后密闭大棚，使温度迅速上升到45C，保持2小时后通风降温降温，因病菌在高温下受到? Cucumber downy mildew is a devastating disease, in the past to take alternative pharmacy 1 protection, control effect is not ideal. In order to effectively control its harm, a variety of prevention and control measures should be taken in combination in order to receive good results. 1. Select the sunny field between the county, the first wash in the shed water, and then closed the greenhouse, so that the temperature rose rapidly to 45C, to maintain 2 hours after the ventilation cooling to cool, due to bacteria at high temperatures by?