苎麻败蔸严重影响高产优质。根据调查,苎麻根腐线虫是引起苎麻败蔸的重要原因,三年以上麻园发病率一般在90%以上,严重的达100%,常年产量一般损失20—50%,严重受害的麻园,遇旱时几乎失败。1981年起,在中国农业科学院麻类研究所的指导下,我们对败蔸苎麻进行了穴浇二溴氯丙烷的试验,四年来对450亩麻园的示范和21.5亩麻地的多点试验表明,穴浇二溴氯丙烷,有以下优点:①根腐线虫死亡率高,一般在90%左右,4月20日穴浇药液,10月30日调查,根腐线虫死亡率为92.8%。②增产效果显著,一般干麻增产20—50%,甚至成倍增产。4月20日穴浇药液,10月30日进行三麻测产,干麻增产56.2%,麻蔸 Ramie defeat severely affected the high yield and quality. According to the survey, ramie root rot nematode is an important cause of ramie failure, more than three years the incidence of Ma Park is generally more than 90%, a serious up to 100%, the annual output of 20-50% of the general loss, severely damaged Ma Park, Almost failed in the event of drought. Since 1981, under the guidance of the Institute of Hemp Research, Chinese Academy of Agricultural Sciences, we conducted a test of pouring dibromochloropropane on mulberry ramie. In the past four years, demonstration of 450 mu of mulch and demonstration of 21.5 mu of mulch showed that , The hole is treated with dibromochloropropane, has the following advantages: ① root rot nematode mortality is high, generally about 90%, April 20 to pour the liquid, October 30 survey, the root rot nematode mortality was 92.8%. ② Significant increase in yield, general dry and ramie yield 20-50%, or even doubled production. April 20 points pouring liquid medicine, October 30 for three Ma test production, dry Ma yield 56.2%, Ma Wan