April 7, 2017 | Blog Post The use of dicamba herbicide will be greatly expanded in the Midwest this year with the planting of dicamba resistant soybeans on millions of acres. Dicamba has been registered for use since 1965 and is sold widely in hundreds of products for broadleaf weed control for crops, rights of ways, and lawns. The increased use this year threatens specialty crops, prairie, and pollinator habitat.