上虞县东关区农技站在老麻地经过几年用二溴氯丙烷防治根结线虫病的研究、试用和推广,取得了一定的成效。麻地,特别是多年老麻地施用二溴氯丙烷后能使根结线虫病下降,黄红麻落叶延迟,生长旺盛,大麻株数增多,植株高度增长,产量明显提高。根结线虫病是黄红麻的主要危害之一, Shangyu County, Dong Guanqu Agricultural Technology Station in Old Muddy after several years with dibromochloropropane control of root-knot nematode disease research, trial and promotion, and achieved some results. Magenta, especially for many years old Dadi chlorbenzuron can make the decline of root knot nematode, yellow kenaf delayed leaf delay, vigorous growth, increased number of cannabis plants increased height, the yield increased significantly. Root knot nematode disease is one of the major hazards of kenaf,