近年,甘肃省马铃薯晚疫病呈严重流行危害态势,究其原因有三点:一是品种普遍不抗病,生产上的主栽品种70%以上都是高感品种;二是菌源充足,不仅种薯带菌,土壤中也存在着大量的病残体及病菌孢子;三是气象条件有利,6-8月降水充沛,对马铃薯晚疫病的流行非常有利。预计这种状态在短期内难以改变,因此马铃薯产业年年都会面临巨大的防控压力。 In recent years, Gansu Province, potato late blight epidemic was a serious epidemic hazard for three reasons: First, the general varieties are not resistant to disease, the production of more than 70% of cultivars are highly susceptible varieties; the second is sufficient bacteria, not only species Potato bacteria, the soil there is also a large number of disease residues and spores of bacteria; Third, favorable weather conditions, June-August precipitation is abundant, the epidemic of potato late blight is very beneficial. This state of affairs is expected to be difficult to change in the short term, so the potato industry will face tremendous pressure of prevention and control every year.