甘薯茎线虫病是北方薯区三大病害之一,近年来有病区扩大,病情加重的趋势,防治此病已成为甘薯生产的一项重要任务。防治方法有: 一、清洁田园,减少土壤线虫数量。线虫主要是通过病苗和病土进行传播。栽秧后,土壤中的线虫就向薯苗“靠拢”为害、繁殖,薯块和薯蔓就成了线虫的“集聚点”。因此,甘薯收获后及时将病薯、病蔓清出田间、深埋或晒干作燃料可大量减少土壤中线虫数量,减轻为害。据北京农大在武清县连作甘薯地观察:1985年发病率90％,收获时将病薯个 Sweet potato stem nematode disease is one of the three major diseases in the northern potato area. In recent years, there is a trend of expanding the ward and exacerbating the disease. Prevention and treatment of the disease has become an important task in the production of sweet potato. Prevention methods are: First, clean the garden, reduce the number of soil nematodes. Nematodes are mainly spread through diseased plants and soil. After planting, the nematodes in the soil to potato seedlings “close” damage, breeding, tubers and potato vine has become a nematode “gathering point.” Therefore, after the sweet potato harvest in a timely manner the disease, disease Man clear out the field, deep or dry as a fuel can greatly reduce the number of soil nematodes, reduce damage. According to Beijing Agricultural University in Wuqing County, even for sweet potato observation: the incidence of 90% in 1985, the harvest will be a potato