Velvetleaf is an annual plant. This should make it easier to control than plants that live many years and regrow from extensive roots, yet this is one of the worst weeds in agricultural fields. Why is velvetleaf still a serious problem in the U.S.?

1. There are no herbicides that are approved for controlling it.

2. Its roots secrete toxins that suppress the growth of neighboring plants.

3. People continue to plant it for fiber production.

4. It produces millions of seeds that remain viable for 50 years.