Herbicide Classification: classification based on chemical structure. Foliar treatment agent: the herbicide solution watered, with small droplets evenly sprayed on plants such herbicide spraying method used is called foliar treatment agent. Soil treatment agent: the herbicide sprayed on the soil evenly shaped in a certain thickness of the drug layer herbicide manufacturers cotton fields, the shoots when weed seeds, seedlings and roots are contacted absorbed and play a role in killing the grass, this acting herbicide, called soil treatment agent. Herbicide technique: strict control of crop sensitivity to herbicides. Different crops sensitive to herbicides herbicide different wholesale cotton fields, if not according to the sensitivity of the crop to the herbicide herbicide selection agent cotton fields, even with the safety of the herbicide on crops, sometimes prone to drug harm. General herbicide for broadleaf weeds in dicotyledonous crops sensitive to herbicides for controlling weeds in cereal crops sensitive.