防除防风、甘草、柴胡、龙胆和细辛田中的杂草确实是个难题。 杂草不仅与药材争夺土壤中的营养和水分，而且还恶化环境。传播病虫害，严重影响药材的产量和质量。如果人工除草，每 667米 2需投入 4～ 5个工日，按每个工日 15元计算每 667米 2需 60～ 75元。这不仅增加种药成本 Control of windbreak, licorice, Bupleurum, gentian and fine Xintian weeds is indeed a problem. Weeds compete not only for medicinal herbs for nutrients and moisture in the soil but also for the environment. Spread of pests and diseases, seriously affecting the yield and quality of medicinal materials. If artificial weeding, each 667 m 2 need to invest 4 to 5 days, according to each day 15 yuan per 667 meters 2 need 60 to 75 yuan. This not only increases the cost of medicine