烟草种子小,幼苗生长缓慢,常常受到杂草危害,杂草主要有:狗尾草、千金子、旱稗、牛筋草、看麦娘、仓耳、莎草、猪殃殃、繁缕、车前草、蒲公英等。烟草田杂草的防除可分为苗床防除和大田防除。而50%敌草胺可湿性粉剂是防除烟田杂草的最佳选择。据有些农药检定所所做的药效试验显示:50%敌草胺可湿性粉剂对烟田杂草的综合鲜重防效达90%以上,基本控制杂草对烟草的危害。针对烟草田不同的生育期,具体的使用方法和用量都有所不同:1、防除苗床杂草时,一般采用播前土壤处理,即在播种前3～5 Tobacco seed is small, seedling growth is slow, often by the weed damage, weeds are: Setaria, cadmium, barnyardgrass, tendon grass, watch the Amanita, warehouse ear, sedge, Galium, chickweed, car Grass, dandelion and so on. Tobacco field weed control can be divided into seedbed control and field control. However, 50% Phentolamine WP is the best choice to control tobacco weeds. According to some pesticide testing done by the efficacy test showed that: 50% of the herbivorous pendants wet weeds can control the fresh weight of more than 90%, the basic control of weeds on tobacco hazards. Tobacco fields for different growth stages, the specific use and dosage are different: 1, the control of seedbed weeds, the general use of pre-sowing soil treatment, that is, before sowing 3 to 5