Shidiao cypress, also known as asparagus, is a perennial crop that grows continuously in the field for up to 10 to 20 years. In the spring before the asparagus stems have not yet grown, weeds just sprouted, available 50% simazine wettable powder 150-200 g / mu, or 40% atrazine gel suspension 150-200 g / mu spray treatment of the soil, effective prevention and elimination of annual monocotyledonous, dicotyledonous weeds, holding period of more than one year, but also in the asparagus before the emergence of the seedling or after the harvest with 50% Saiketsu wettable powder 100-150 g / mu, spray treatment of the soil, can effectively prevent and eliminate the annual monocotyledonous, bilobate weeds, holding period of one year or more, also in the asparagus before or after the harvest, spraying It can effectively prevent and eliminate annual broadleaf weeds and some grass weeds.

After the asparagus harvest, 48% fluroxypyr emulsifiable concentrate 100~150 ml/mu can be used to treat the soil by spraying, which is effective in preventing and removing annual grass weeds and some annual broadleaf weeds.