轻微感染的种薯可以越冬 ,第二年播种后产生病苗 ,形成中心病株 ,再向周围蔓延 ,形成发病中心 ;1996年中国首次报道发生A2交配型 ,以后在马铃薯主产区陆续发现A2交配型 ,其发生频率北方高于南方 ;对人工培养基上卵孢子产生的条件 ,病菌的薯片培养法和液态氮的保存效果 ,也进行了初步研究 ;影响晚疫病开始流行的气候条件主要是温度和湿度 ,但是在我国复杂的地理气象条件下 ,温、湿度在各地的作用是不同的 ,在春旱地区 ,湿度是限制因素 ,在潮湿多雨的地区 ,温度是限制因素 ;经过多年试验 ,初步建立了宁夏南部山区马铃薯晚疫病流行的灰色预测模型 ,可以对当地晚疫病的流行进行长期预测 ,回测准确 ;抗病育种的研究 ,目前倾向于水平抗性的筛选 ,已评价出一批对晚疫病具有水平抗性的优良无性系 ,利用这些无性系 ,有希望培育出具有水平抗性的有推广价值的高产品种 ;对马铃薯块茎晚疫病鉴定方法 ,马铃薯抗晚疫病的遗传工程也开展了研究 ,并取得良好进展 ;室内菌株测定和田间试验 ,均证明抗瑞毒霉菌株的存在 ,导致瑞毒霉防效降低 ,但是它的复配药剂瑞毒霉锰锌仍保持很高的防效 ;中国在近几年已研究出一种新的杀菌剂氟吗啉 ,具有很好的保护和治疗效果 ,明显高于克露、普力克、瑞毒霉等目前常用的杀菌剂品种 ;嗜线? Slightly infected seedlings may overwinter. The second year after planting, the disease seedlings will be formed to form the central diseased plants which will then spread to the surrounding areas to form the center of disease. In 1996, China reported A2 mating type for the first time and later discovered A2 Mating type, its frequency of occurrence is higher in the north than in the south. Preliminary studies have also been conducted on the conditions for producing oospores on artificial media, the potato chip culture method for bacteria, and the preservation of liquid nitrogen. The climatic conditions influencing the epidemic of late blight are mainly Is the temperature and humidity, but in our country’s complex geographical and meteorological conditions, temperature and humidity in different parts of the role is different in the spring drought area, humidity is the limiting factor in humid and rainy areas, the temperature is a limiting factor; after years of testing , A gray prediction model of potato late blight epidemic in the mountainous area of ​​southern Ningxia was preliminarily established, which can make long-term prediction of the epidemic of late blight in the local area and make accurate back-testing. In the research of disease-resistant breeding, the screening of horizontal resistance is currently favored, Approved the late blight resistance level with excellent clones, the use of these clones, there is hope to develop a level of resistance to promote Value of the high yield varieties; late blight identification method of potato tubers, potato late blight resistance of genetic engineering has also been studied and made good progress; indoor strains and field trials, both proven anti-retroviruses strains, resulting in Rui poison Mold control efficiency is reduced, but its compounding agent Rui Zhi mold manganese and zinc still maintain a high control effect; China in recent years has developed a new fungicide flumorph, with good protection and treatment effect , Significantly higher than the Kro, Purcek, Rui Shi mold and other commonly used fungicide varieties;