Palmer amaranth is an invasive weed that is native to the southwestern United States. Over the last three years, however, the weed has made its way into Iowa and has been identified in at least nine counties, most recently in Madison, Clayton, Washington and Crawford counties.
The longstanding annual Weed Identification Contest will take place once again this year at the Iowa State Fair on Aug. 12 from 9 a.m. to 11: 30 a.m. in front of the John Deere Agriculture Building.
Farmers need to exercise caution when it comes to herbicide selection if they intend to graze or harvest a cover crop.
The status of weed control across the state and the most effective herbicides for tackling weeds are outlined in a recently released Iowa State University Extension and Outreach publication.
Bob Hartzler and Mike Owen, professors of agronomy and ISU Extension and Outreach weed scientists, updated the 2015 Herbicide Guide for Iowa Corn and Soybean Production to reflect the 2014 growing season, product effectiveness and changes in industry offerings.
In response to expanding problems associated with herbicide resistant weeds, weed specialists with Iowa State University Extension and Outreach will conduct a series of meetings in November and December to address the issue.
Iowa State University Extension and Outreach will conduct a series of meetings in March to address problems associated with herbicide resistant weeds. The meetings will provide information about the causes of herbicide-resistant weed populations, objectively evaluate weed management programs currently used in Iowa and support the development of durable weed management programs.