Cocklebur Making a Problematic Return in South Central Illinois
Nov 03, 2026
Eric Oseland, the lead agronomist with The Equity Co-op in south central Illinois, reports that cocklebur is once again becoming a concern.
“Driving through the countryside and walking fields, there’s a lot of cocklebur starting to become problematic,” Eric Oseland tells Brownfield.
He explains, “Cocklebur is a large-seeded broadleaf, and some of our group 15 herbicides, which are commonly used for waterhemp control, don’t work effectively on cocklebur.”
Oseland suggests that harvest is an opportune time to assess weed issues and adjust strategies accordingly.
“If I’m focusing on cocklebur control through residual methods, I’ll opt for a product containing an ALS component,” he advises. “There are also new products entering the market.”
With cocklebur top of mind for many farmers in the area as they plan for 2027, Oseland encourages growers to consult with their local agronomist for tailored advice.