晚疫病是陇南市马铃薯主要病害。为了有效控制晚疫病流行，确保陇南市马铃薯产业安全，通过连续8年观测，建立了以7月份平均气温、7月份降水量、6月上旬至8月中旬降水日数为自变量的回归预测模式。筛选出最佳防治农药氟菌·霜霉威以及常用农药甲霜灵锰锌的最佳防治时期和防治次数。即：采用氟菌·霜霉威于7月上旬喷药防治1次即可；或用甲霜灵锰锌于发病初期开始，每7~10 d喷药1次，7月底停止防治。%Potato late blight is a main disease of potato production in Longnan City. In order to control the epidemic of the disease effectively and ensure potato production safely, a regression prediction model was established based on systematic observation of the average temperature and the precipitation in July, and precipitation days in the early June to mid-August as independent variables. Fluopicolide-propamocarb as a favorable preventive fungicide was chosen for potato late blight control. The best prevention time and application frequency of the conventional fungicide Metalaxyl mancozeb had been calculated. One application of Fluopicolide-propamocarb in the early July was effective to control the disease. The use of Metalaxyl mancozeb should be applied at the beginning of the disease, and applied once in 7-10 days, and stopped at the end of July.
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