Illinois
University of Illinois Weed Science
2022 Weed Control Guide (for purchase)
Indiana
2022 Weed Control Guide (for purchase)
Iowa
Iowa State University Weed Science
Herbicide Guide for Iowa Corn and Soybean Production
Kansas
Kansas State University Weed Science
Chemical Weed Control for Field Crops, Pastures, Rangeland, and Noncropland
Manitoba
Michigan
Michigan State University Weed Science
Weed Control Guide for Field Crops
Minnesota
University of Minnesota Applied Weed Science Research
University of Minnesota Extension – Crop Production (Weed Management)
Missouri
University of Missouri Weed Science
Nebraska
University of Nebraska Weed Science
2022 Guide to Weed Management (for purchase)
North Dakota
North Dakota State University Weed Science
North Dakota Weed Control Guide
Ohio
The Ohio State University Weed Science
2022 Weed Control Guide (for purchase)
Ontario
South Dakota
South Dakota Pest Management Guides
Wisconsin