Published Mar 4, 2021

Interseeding Covers: Weed Management Considerations in Narrow- and Wide-Row Corn – 2021 Virtual Annual Conference

By Practical Farmers of Iowa


On-farm field trials in the northeastern U.S. have resulted in inconsistent performance of interseeded cover crops in field corn. In many areas, interseeded cover crops establish but fail to persist through the growing season, resulting in a poor return on investment. This presentation highlights ongoing research that evaluates the effects of corn row spacing (30-inch vs. 60-inch), corn hybrids and interseeding timing on cover crop performance. Potential herbicide management strategies for interseeding is also highlighted.

  • John Wallace is an assistant professor and extension weed specialist for field and forage crops at Penn State University. His program focuses on developing cover crop-based integrated weed management strategies, best management practices for herbicide use in conservation tillage systems and weed management in reduced-tillage organic systems.