甘薯茎线虫病(俗称地瓜茎线虫病、糠心病、空梆病)是地瓜生产上的一种毁灭性病害;目前在北京、山东、河北、河南、江苏、辽宁、福建、甘肃等省市均有分布。近几年来,甘薯茎线虫病在我地发生日趋严重,发生面积约15—20万亩,占地瓜面积的50—60%。从生长期到贮藏期,一般发病率为 Sweet potato stem nematode disease (commonly known as sweet potato stem nematode disease, chaff disease, air disease) is a devastating disease in sweet potato production; currently in Beijing, Shandong, Hebei, Henan, Jiangsu, Liaoning, Fujian, Gansu and other provinces There is distribution. In recent years, sweet potato stem nematode disease occurs increasingly serious in my place, the occurrence of an area of ​​about 15-20 mu, accounting for 50-60% of land area. From the growth period to the storage period, the general incidence rate is