Kansas Corn Commission

07/09/2025 | Press release | Distributed by Public on 07/09/2025 15:49

Corn Leafhopper Confirmed in Reno County Today (7-9-25)


Corn Leafhopper Confirmed in Reno County Today (7-9-25)

July 9, 2025-K-State Row Crop Plant Pathologist Rodrigo Onofre, Phd., says corn leafhopper has been found in Reno County. This is the first detection of corn leafhopper in Kansas in 2025. Onofre's team, coordinating with the Kansas Corn Commission, Independent Crop Consultants and Corteva established a trapping program with sites across the state to monitor for corn leafhoppers. A crop consultant involved in this collaborative effort found corn leafhopper in Reno County.

Late-planted corn and/or double cropped corn are at higher-risk of yield impact than early planted crop. Corn stunt disease symptoms can take up to 40 days for symptoms to become visible.

Not all leafhoppers are corn leafhoppers. If the corn leafhopper is found near or in your area, begin scouting your fields.

Due to the efficiency of the corn leafhopper to transmit pathogens associated with corn stunt disease, there is no economic threshold.

Growers are encouraged to apply insecticide when corn leafhoppers are detected. At this time, it is unknown the exact corn growth stage at which scouting should cease. Past guidance encouraged through V8 but more studies are needed to verify the validity of this claim. Keep in mind that spraying for CLH could increase the chances of spider mites.

K-State Plant Pathology Department is offering FREE TESTING for Leafhopper (CLH Confirmation and Pathogen Presence) and FREE TESTING for corn stunt disease plant tissue.

Free Testing - Leafhopper Sampling Protocol

(CLH Confirmation and Pathogen Presence)

  • Use a sweep net to collect leafhoppers
  • Empty sweep net into gallon plastic bag
  • Ship leafhopper sample on or before Wednesday
  • Ship leafhopper sample ASAP overnight via UPS or FedEx if possible

Free Testing - Tissue Sampling Protocol

  • Collect symptomatic fresh leaf tissue
  • Label and use plastic bags
  • Ship leaves on or before Wednesday
  • Ship leaves ASAP overnight via UPS or FedEx if possible

Send samples to:

K-State Plant Disease Diagnostic Lab
4032 Throckmorton PSC
1712 Claflin Road
Manhattan, KS 66506

VISIT THE KANSAS CORN WEBSITE HERE FOR MORE INFORMATION ON THIS AND OTHER CORN DISEASES



Kansas Corn Commission published this content on July 09, 2025, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on July 09, 2025 at 21:49 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at support@pubt.io