Herbicide injury prevention: In order to prevent improper use of herbicides to produce injury, must be in strict accordance with the use of technology and standards. Note herbicide sensitive crops. Different crops for different herbicide sensitivity inconsistent. Herbicides control broadleaf weeds in corn fields of cereal crops sensitive to herbicides and broadleaf crops for controlling weeds in herbicide sensitive. Improve herbicide effect: pay attention to mixing, alternating the use of herbicides. Due to many years of continuous use with herbicides Xinxiang cornfield herbicides, easily lead to decreased sensitivity Zhejiang cornfield weed herbicide resistant weeds anti-rise, therefore, to be mixed between herbicide use and annual alternating order to achieve the purpose of long-term control weeds.