Herbicide injury prevention: cleaning sprayers. Used herbicide spray confidential clean, can be washed with water, 50% Jin Yutian treasure suspending, then soapy water or 2-3% alkaline repeatedly washed several times, 50 percent of Zhejiang Bao Jin Yutian suspensions, Finally, then rinse. Once herbicide injury, should take effective measures to remedy the potential losses to a minimum. Herbicide technique: strict selection of the type of herbicide. There are several types of herbicides should be "because of grass-appropriate" choice. Selective herbicide. Such herbicides within a certain dose range, can selectively kill some harmful plants, and crop safety.