人工防除胡麻地中的灰条、苍耳等杂草,既费工,又难除净。如果混有油菜、芸芥等,对产量影响很大,还降低食油的品质;留作种子很难清选干净,造成混杂日益加剧。去年我们试验用二甲四氯防除胡麻地的双子叶杂草,表现省工、安全、除草彻底的优点。供试农药:20％二甲四氯(天津农药厂产)。供试胡麻品种:维尔1650。4月26日播种,5月3日出苗。 Artificial control flax in the gray bar, cocklebur and other weeds, both labor, but also difficult to remove the net. If mixed with rape, Yunbai, etc., a great impact on the yield, but also reduce the quality of cooking oil; it is difficult to clean as a seed, resulting in increasing mixing. Last year we tested dicotyledonous weeds with flavan tetrachloride against flax, showing the advantages of labor saving, safety and thorough weeding. Test pesticides: 20% dimethyl tetrachloride (Tianjin Pesticide Factory production). Test flax varieties: Weir 1650. April 26 sowing, May 3 emergence.