Profit margins are already razor-thin for many Midwest farmers this year, prompting increased diligence in scouting and early detection of crop threats. With careful planning and proactive crop protection strategies in place, most producers felt prepared for the growing season. But now, an unexpected and rare pest has surfaced — one so uncommon that it falls outside the scope of most treatment plans. Its reappearance is frustrating and raises fresh concerns about how to respond effectively.
The pest in question is the Grape Colaspis, a small beetle not typically seen in damaging numbers in this region. It hasn’t crossed into Iowa just yet, but confirmed sightings in Illinois have it uncomfortably close. Nick Seiter, an entomologist closely monitoring the situation, says he’s surprised by the early emergence and population levels already being reported, especially since the pest hasn’t made a notable appearance in the Midwest since 2018. It’s a development that’s caught even seasoned experts off guard.
Seiter says the signs of Grape Colaspis damage are already starting to show up in some corn fields. The early indicators can look like nutrient deficiencies, but there’s a deeper issue just below the surface.
The real challenge with Grape Colaspis is the lack of established control options. Because the pest rarely appears in damaging numbers, there’s limited research and experience on how best to manage it. That uncertainty makes it difficult for farmers to respond quickly or effectively.
While Grape Colaspis hasn’t yet been confirmed in Iowa fields, its presence just across the border is a reminder that farmers should stay alert. The unusual nature of this pest means it could easily be overlooked during routine checks. Iowa producers are encouraged to keep an eye out for signs of feeding damage and bring in their agronomist if something looks off — early detection could be key.
