黄瓜霜霉病 1.高温闷棚法: 在黄瓜霜霉病初发生或未发生前,于晴天早上浇透水,闷棚,升温至45℃,保持2小时,再放风,注意随时观察温度变化,以免温度过高烧苗。为此,应在棚中间上、中、下各挂一温度计,每10—15分钟查看一次,此法在霜霉病发生较严重地块使用效果也很好,在未发生地块使用此法预防效果更好。 2.如果对高温闷棚技术把握不准,可采取如下措施: ①及时摘除无功能老叶,施二氧化碳气肥,喷磷酸二氢钾比例:白糖1份+尿毒素0.5 Cucumber downy mildew 1. Sopping law at high temperature: Cucumber downy mildew in the early or no place before, in the sunny morning, water, boring shed, warmed to 45 ℃, kept for 2 hours, and then the wind, pay attention to observe the temperature changes at any time, To avoid excessive temperature burning seedlings. To this end, should be in the middle of the shed, in the next hang a thermometer, check every 10-15 minutes, this method in the more serious use of downy mildew block effect is also very good, in the absence of land use this method Prevention effect is better. 2. If you are not allowed to grasp the high temperature boredom technology can take the following measures: ① timely removal of non-functional old leaves, carbon dioxide gas fertilizer, spraying potassium dihydrogen phosphate ratio: 1 sugar + uremia 0.5