WASHINGTON (AP) — The Environmental Protection Agency has approved a new version of a popular weed killer to be used on genetically modified corn and soybeans.

The EPA said Wednesday that it will allow the use of a 2,4-D weed killer called Enlist Duo, a new version of the popular herbicide used since the 1940s. It is designed to be used with genetically modified corn and soybeans approved by the Agriculture Department last month.