Herbicide classification: use according to classification. Soil treatment agent also known as pre-emergence sealant applied to the soil Xinxiang wheat field herbicide, herbicidal play through the root, coleoptile or hypocotyl weeds and other parts of the absorption, can control the weeds have not unearthed in Luoyang wheat fields weeding agents, have been unearthed weeds worse, usually before crop sowing or transplanting seedlings Front administration after sowing. Herbicide injury prevention: In order to prevent improper use of herbicides to produce injury Zhejiang wheat field herbicide, 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 on cereal crops sensitive to broadleaf crops to control grassy weeds in herbicide sensitive.