In the past couple of years, there has been increasing concern about the impact of residual herbicides in the field hampering or killing cover crops, including annual ryegrass.

Mike Plumer, a pioneer in the cover crop renaissance in the Midwest, has published a handy guide to specific residual herbicides and his observation about their affect on different cover crops.

Click here for a selection of publications about the herbicide carryover issue..

• Mike Plumer’s guide is near the top. It comes up as a Word document
• University of Wisconsin Extension
• Penn State University
• Purdue University