我县有稻田3万亩,解放以来,单产一直徘徊在200斤左右,影响产量的一个重要因素是杂草危害严重.七十年代初,我们曾进行过小面积除草剂试验,但引进品种较少,只有少量敌稗、二甲四氯、五氯酚钠和2,4—D,1979—1981年又分别引进了除草醚粉剂和50%杀草丹乳油等,近几年推广使用面积2,000—3,000亩. Since the liberation, the counties have been hovering around 200 kilograms, an important factor affecting the yield of weeds is a serious hazard .In the early seventies, we have conducted a small area of ​​herbicide test, but the introduction of more varieties Less, only a small amount of propanil, MCPA, sodium pentachlorophenate and 2,4-D, respectively, in 1979-1981 were introduced weed ether powder and 50% herbicide Dan-Dan, etc., in recent years to promote the use of an area of ​​2,000 -3,000 acres.