地瓜茎线虫病(俗称地瓜糠心病)是地瓜的一种毁灭性病害,也是国内植物检疫对象。这种病主要靠种瓜、秧苗和土壤传播,蔓延很快。我市不少地瓜产区,因发病严重又缺少有效防治办法,近几年几乎不能种植地瓜。过去对地瓜茎线病的防治,主要采取加强种、苗管理和用呋哺丹、滴滴混剂、二溴氯丙烷、克线磷、涕灭威等化学药剂。但防治效果很不稳定。又加成本高、使用不便,污染环境重,致使此病一直得不到有效的控制。针对上述情况,我市周 Sweet potato stem nematode disease (commonly known as sweet potato heart disease) is a devastating disease of sweet potatoes, but also the object of domestic phytosanitary. The disease is mainly spread on seeds, seedlings and soil, spreading rapidly. Sweet potatoes in many areas of the city, due to serious illness and lack of effective prevention and control measures, in recent years almost impossible to grow sweet potatoes. In the past, prevention and treatment of sweet potato stem line disease, mainly to strengthen the species and seedlings management and furosemide Dan, drops of mixture, dibromochloropropane, grams of phosphorus, aldicarb and other chemical agents. However, the control effect is very unstable. Plus the high cost, inconvenience to use, heavy pollution of the environment, resulting in the disease has not been effectively controlled. In response to the above situation, the city week