长期以来,卢龙县甘薯产业一直以甘薯生产—淀粉加工—粉条加工一条链为主,栽培品种也以高淀粉型为主。高淀粉品种的连年重茬种植,造成甘薯茎线虫病为害日趋严重,种植成本增加,总体效益下滑,同时,大量使用高毒农药,农业污染问题更加突出。 For a long time, Lulong County sweet potato industry has been the production of sweet potato - starch processing - vermicelli chain-based processing, cultivars also high starch-based. The continuous stubble planting of high-starch varieties caused more and more serious damage to sweet potato stem nematodes. The cost of planting increased and the overall benefits declined. At the same time, the problem of agricultural pollution was more prominent due to the extensive use of highly toxic pesticides.