Corn leafhopper found again in Minnesota in 2025

By Scout Nelson

Researchers from the University of Minnesota have confirmed the detection of the corn leafhopper (Dalbulus maidis) in the state for the second consecutive year. The insect was identified in Waseca County during the 2025 growing season, with adult specimens captured on yellow sticky traps placed in corn fields during the R5-R6 growth stage.

According to scientists, adults were captured only in September, suggesting a late-season migration. The corn leafhopper can be found on both the top and bottom surfaces of corn leaves and is recognized by its light yellow to white body and distinctive black spots, including two large black markings above the eyes.

This pest is known for transmitting pathogens that cause stunting diseases in corn, resulting in symptoms such as reduced plant growth, red or yellow leaf discoloration, and poor ear development. However, researchers note that both the 2024 and 2025 detections occurred late in the season, posing minimal risk to crops near harvest.

“Continued monitoring will be important to track its spread and assess potential risks,” researchers said, adding that warmer fall temperatures and southerly winds could cause earlier arrivals in future seasons, raising potential risks for late-planted corn.

The corn leafhopper is native to Mexico and widely distributed across the southern United States. It is a specialist herbivore associated with corn and its wild relatives. The pest cannot survive harsh northern winters, so individuals found in Minnesota are likely migrants from southern regions, transported north by storm systems or prevailing winds.

Although the species thrives in warm climates between 77–86°F, low northern temperatures limit its survival. While reproduction occurs only on corn, the insect can temporarily survive on alfalfa, winter wheat, triticale, and gamma grasses.

For further information and updates, visit the University of Minnesota Extension Crop News blog at blog-crop-news.extension.umn.edu.

Photo Credit:gettyimages-chrisboswell