甘薯茎线虫又称糠心病、空心病等，是甘薯生产上的一种毁灭性病害，为我国植物检疫对象。该病在我国南北各薯区均有不同程度的发生，其中尤以鲁、冀、京、苏、豫等省区发生最为严重，该病可危害地下薯块和地上茎蔓，造成烂种死苗，一般可减产１０％～５０％，严重的可造成绝产 Sweet potato stem nematodes, also known as heart disease, hollow disease, is a devastating disease in the production of sweet potato, plant quarantine for our object. The disease occurs in different degrees in our country’s northern and western regions, especially in Shandong, Hebei, Beijing, Jiangsu and Henan Provinces, which can endanger the underground tubers and the aboveground stems and stems, resulting in rotten seedlings , Generally reduce 10% to 50%, serious can cause junk