Weeds
Learn more about problem weeds in Iowa, utilizing different management tactics to help control problem weeds, and more about how to minimize the spread of herbicide resistance.
Tools and Resources
- All Weeds and Weed Control Publications
- Herbicide Options for Palmer Amaranth in CRP
- Iowa's Noxious Weed Law: Chapter 317
- Palmer Amaranth Identification
- Weed Identification Fact Sheets
- Weed Identification Field Guide 2nd Edition
- 2025 Herbicide Guide: Iowa Corn and Soybean Production
- Weed Content Index
Timely Insights on Weeds
-
January 13, 2026Content Author
Spray drones are increasingly being evaluated by Iowa farmers as an additional tool for crop input application. When used appropriately, these systems can provide flexibility for timely applications, reduce field traffic, and improve access to areas that are difficult to reach with traditional ground equipment.
-
December 18, 2025Content Author
To maintain your private pesticide applicator certification, you must either pass an exam every three years or attend an approved Private Continuing Instruction Course (P-CIC) between December 1 and April 15 each year your certification card covers.
-
December 15, 2025Authors
AMES, Iowa – The 2026 Crop Advantage Series will take place at 12 locations across the state Jan. 6–29. Each meeting will feature tailored topics selected based on local growing conditions and challenges, presented by Iowa State University Extension and Outreach specialists.
-
December 4, 2025Content Author
This year we are offering on-site registration for the Integrated Crop Management Conference! Join us on December 10-11 at the Meadows Events and Conference Center in Altoona, IA for two days jam-packed with networking, continuing education, and insight for 2026 and beyond.
Highlights of this year’s event include:
-
October 27, 2025Content Author
While harvest is slowing down across the state, many have noticed new plant growth in the field: volunteer corn. While volunteer plants aren't unusual, it is rare to see so many fields with substantial unwanted plants this fall. Let’s examine why and what it might mean for 2026.