甘薯茎线虫是甘薯生产上的一种毁灭性病害,它危害性强,传播速度快。它在苗床期,大田期和贮藏期都能侵染危害,但主要侵染薯块。受害的甘薯外皮褐色,发青,有龟裂纹,块轻,有的薯块外表无异样,只是内部糠心。该病不但影响甘薯的品质,、而且严重影响甘薯的产量。甘薯茎线虫病是由一种寄生性茎线虫侵 Sweet potato stem nematode is a devastating disease in the production of sweet potato, which is harmful and spread rapidly. It can infect the seedbed, field and storage period, but mainly infects the potato. Affected the sweet potato skin brown, blue, cracked, lumps, and some tubers appearance is not abnormal, but the internal heart. The disease not only affects the quality of sweet potato, but also seriously affect the production of sweet potato. Sweet potato stem nematode disease is caused by a parasitic nematode invasion