What herbicides are used in orchids?

Herbicides such as fluorosulfonate, prednisone, atrazine, trimethoprim, dimethyl tetrachloride, "2pyrine 4-butyl ester" and other herbicides can be used to grow orchid. We should also pay attention to the weather when applying, generally required to apply in windless days, under dry conditions, increase the amount of water or after watering, sandy land, low organic matter content, appropriately reduce the amount of medicine, spray in case of rain in a short time after spraying, spray equipment should be cleaned repeatedly.