Herbicide classification: use according to classification. Soil treatment agent also known as pre-emergence sealant applied to the soil Zhejiang cornfield herbicides, play a role in weeding through the root, coleoptile or hypocotyl other parts of Xinxiang cornfield weeds absorb herbicides can control not unearthed Miscellaneous corn field grass herbicides, weeds that have been unearthed worse, usually before crop sowing or transplanting seedlings Front administration after sowing. Herbicides prevent: those long residual effect of herbicide degradation in the soil, planting structure adjustment in, be careful when switching to crops, the crop species to find out what, what is the use of herbicides herbicide Luoyang cornfield, Vinca how long, what should replant crops, after the crop safety. Try not to use long residual effect of herbicides.