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The Bulletin

Applied Research Results for 2025 Now Available

Nick Seiter

Department of Crop Sciences
University of Illinois

May 1, 2026
Recommended citation format: Seiter, N.. "Applied Research Results for 2025 Now Available." Department of Crop Sciences, University of Illinois at Urbana-Champaign, May 1, 2026. Permalink
Many yellow and black beetles feeding on a pumpkin blossom among weeds and some corn foliage.
Western corn rootworm beetles feeding on a pumpkin blossom in our trap crop. We use pumpkins to increase rootworm oviposition for our evaluations.

Each year, we conduct field evaluations, surveys, and other projects that have direct implications for pest management decisions made by Illinois farmers. For example, we conduct third-party evaluations of many of the insecticides and biotech traits available for corn rootworm control every season. Our annual report summarizes these findings for farmers, crop advisors, and others who have a stake in control decision-making. The 2025 report (along with previous reports dating back to 2018) can be found at the following link: https://go.illinois.edu/pestmanagementresearchreport. Within the 2025 report, you can find the following:

  • Results of the statewide insect pest survey in corn and soybean, conducted annually since 2013 in July and August throughout the nine Illinois Crop Reporting Districts
  • A summary of agronomic crop samples submitted to the University of Illinois Plant Clinic
  • Small-plot evaluations of fungicide and insecticide efficacy for controlling tar spot, northern corn leaf blight, southern rust, red crown rot, and corn rootworm
  • The first published report of the frequency of extended diapause in Illinois populations of northern corn rootworm in decades
  • Results of bioassays documenting the ongoing development of resistance to Bt traits in western corn rootworm populations
  • Small-plot and on-farm trials evaluating the impact of seed- and foliar-applied insecticides in soybean on pest populations and yield

Consider thumbing through this report as your schedule permits for valuable insights on control performance and insect and disease management in Illinois. Please do not hesitate to reach out if you have any questions about our results.

Nick Seiter – Field Crop Entomologist | nseiter@illinois.edu

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