除草是草坪养护的重要环节。人工拔草劳动强度大,工作效率低,费用也较高。天津农学院孟庆田等用2,4—D丁酯在天津市区草坪上进行的化学除草试验取得成功。据天津农学院学报1994年第3—4期报道,使用沈阳军工厂生产的67％的2,4—D丁酯稀释800倍,在品种为美国“兰草”的草坪上,于4月末上午9～10时进行茎叶喷雾(草坪高度为20cm,杂草高度为20～30cm),可以有效地杀死草坪上的双子叶杂草。喷药3天后杂草的顶尖开始枯萎,7天后杂草的全株开始枯萎并逐步死亡,到15天调查时杂草全部死亡,除草效果为100％。这种除草效果可持续到7月份雨季之前,持效期约2个月左右。800倍稀 Weeding is an important part of lawn conservation. Labor pulling strong labor, low efficiency, higher costs. Tianjin Agricultural College Meng Qing Tian and other 2,4-D butyl ester in the Tianjin area of ​​the lawn weeding chemical success. According to Journal of Tianjin Agricultural College, No. 3-4, 1994, it was reported that the use of 67% 2,4-D butyl ester produced by Shenyang Military Academy was diluted 800 times. On the lawn with the variety “Blue Grass” of the United States, ~ 10 spray stems and leaves (lawn height of 20cm, weed height of 20 ~ 30cm), can effectively kill the lawn dicotyledonous weeds. The top of the weed began to wilt 3 days after spraying. After 7 days, the whole plant of the weed began to withered and gradually died. All weeds were killed by the 15-day survey and the weeding effect was 100%. This herbicidal effect lasts until the rainy season in July and lasts for about 2 months. 800 times thinner