近年来,春播马铃薯主产区晚疫病连年较重发生,种薯带菌率较高,且当前主栽品种抗病性普遍较差。据各病虫区域站监测,春播马铃薯晚疫病已在西南、华中春播地区发生为害,局部地区已呈偏重以上程度流行态势。据国家气候中心预测,6~8月份,西北、华北地区大部和东北地区西部降雨 In recent years, the late blight of spring potato sowing main producing areas occurred year after year, with higher rate of seed-tubing, and the current cultivars are generally poor in disease resistance. According to the monitoring of the pest and disease regional stations, spring potato-borne late blight has been harmed in the southeast China and the spring sowing areas in central China, and the epidemic situation in some areas has been more or less emphasized. According to the National Climate Center prediction, from June to August, most of the northwest, north China and the northeast rainfall