Acetochlor is an herbicide that is widely used to control weeds in corn, soybean, and sugar beet acres. The MDA has frequently detected acetochlor in streams and other surface waters, occasionally at concentrations above or nearing state water quality standards. 

Acetochlor is a pre-emergence or early post-emergence soil-applied herbicide for the control ofannual grasses and certain annual broadleaf weeds

Acetochlor is a selective herbicide, which after application is absorbed mainly by the shoots ofgerminating plants and to some extent by roots. Acetochlor controls annual grasses and broadleafweeds, germinating from seeds; however, its action against perennial weeds is very limited.Acetochlor is a pre-emergence or early post-emergence soil-applied herbicide for the control ofannual grasses and certain annual broadleaf weeds.