越南马铃薯晚疫病的研究概况

晚疫病是越南马铃薯上最重要的病害。各马铃薯产区均有发生。在江河三角洲地区晚疫病的发生通常比较晚，从12月下旬即第二个生长季后半期开始发病，在1月至2月气温较低、湿度较大时，晚疫病常常严重流行。在Sapa地区（北京高原），整个生长晚疫病对马铃薯作物都是主要威胁。在感病品种上病害的发生和严重度可达到100％。在大叨地区，在干旱季节（11－4月）晚疫病发生最轻，而在雨季（5－10月）严重流行。在越南，还未进行晚疫病菌生物学和流行学方面的基础研究。对晚疫病防治研究主要集中在筛选新的杀菌剂。大部分工作集中在抗病育种和抗病品种的筛选。目前需要进行晚疫综合治疗、流行学、晚疫病菌生物学和抗病育方面的深入研究和培训。

The late blight disease of potato in Vietnam

Late blight is the most important disease of potato in Vietnam. It occurs in all potato production areas. In the Red River Delta, the disease usually occurs lately during the second half of the main growing season starting some time in late December. Severe epidemics often break out during January and February when the weather is cold and wet. In Sapa, a northern highland, late blight is a major threat to any potato crop during the growing season. Disease incidence and severity can be as high as 100% with susceptible varieties. In Dalat, the disease occurrence is minimal during the dry season (November-April), but highly prevalent during the rainy season (May- October). In the country, there has been no fundamental research on biology and epidemiology of the pathogen. Similarly, most of research on disease control focuses on testing of new chemical fungicides. Most effort has been concentrated on practical breeding and selection for resistant varieties. Research and training needs on integrated management, biology and epidemiology of the disease as well as further research on breeding for resistance are addressed.