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薄荷生长过程中,杂草危害十分严重。据凋查,恶性杂草及优势种有马唐、牛筋草、狗尾草、早稗、小旋花、小蓟等,禾本科杂草占85％以上,密度一般每平方尺50～70株,高的达100株以上。1985年我们开展了稳杀得(剂型为35％乳油)防除薄荷田杂草试验、示范和推广工作,取得了明显的效果。 一、稳杀得用量、草龄与防效的关系 1.稳杀得对头刀薄荷田杂草的防治效果:头刀薄荷田每亩使用稳杀得1两、1.5两、1.8两、2.6两、3两,各兑水100～120斤,分别于禾本科杂草1～2叶期、3～5叶期、6～7叶期、高龄期(孕穗至抽穗期)进行茎叶喷雾,设喷清水为对照。用药前调查杂草基数,用药后20天、40天定点调查残存杂草数量,并计算校正防效。
Mint growth is very damaging to weeds. According to the survey, weeds and dominant species of crabgrass, tendon grass, Setaria viridis, as early as barnyardgrass, thistle, gramineous weeds accounted for more than 85%, the density of generally 50 to 70 lines per square foot, High up to 100 or more. In 1985, we conducted a steady and kill too (35% EC cream formulations) weed control weed test, demonstration and promotion work, and achieved remarkable results. First, the stability of the amount of consumption, the relationship between grass age and control effect 1. Stable and kill the head knife peppermint weed control effect: Head knife peppermint use per acre steadily 1 two 1.5, 1.8 two, 2.6 two , 3 two, each watered 100 ~ 120 pounds, were weeds in the weeds 1 to 2 leaf stage, 3 to 5 leaf stage, 6 to 7 leaf stage, high age (booting to heading) stems and leaves spray, set Spray water as a control. Before treatment weed weed base number, 20 days after treatment, 40 days of fixed-point investigation of the number of weeds remaining, and calculate the correct control effect.