Stakeholder assessment of herbicide use patterns, cost, and perceived weed control in Wisconsin corn production systems across atrazine‐allowed and atrazine‐prohibited areas

Plain Language Summary Atrazine is a critical weed management tool in corn ( Zea mays L.) production. In Wisconsin, its prohibition on ∼250,000 ac of corn production removes a cost‐effective herbicide option for growers. However, current information on atrazine use patterns, herbicide programs, and differences in cost and perceived weed control satisfaction between areas where atrazine is allowed and areas where it is prohibited remains limited. To address this gap, we surveyed 42 stakeholders in 2024 to assess corn herbicide use patterns, herbicide programs, cost, and satisfaction differences between areas where atrazine is allowed and where it is prohibited. Glyphosate, atrazine, and mesotrione were the most commonly used herbicides. Atrazine was applied primarily preemergence, with at least one application on 83% of acres where it was permitted. Herbicide costs were similar across areas, but perceived weed control satisfaction was slightly lower in atrazine‐prohibited areas where glyphosate, S ‐metolachlor, and mesotrione were the most commonly used herbicides. Herein, we document the relevance of atrazine and highlight the opportunity for additional research and education on its use patterns and on atrazine‐alternative herbicides.