Cody supports the citizens of South Dakota as an SDSU Extension Horticulture Plant Pathology Field Specialist at the South Dakota State University campus in Brookings.
Cody Molnar
SDSU Extension Horticulture Plant Pathology Field Specialist
Also by Cody Molnar
Corn Disease Update: September 2, 2025
As of September 2, 2025, a number of corn diseases have been reported and confirmed throughout South Dakota. View our latest findings as we approach the fall harvest season.
Aster Yellows Phytoplasma
Aster yellows is a phytoplasmal disease carried and introduced by aster leafhopper. It is known to infect over 80 different plant families, as the aster leafhopper has extremely broad feeding habits.
Corn Diseases in South Dakota Update
Several South Dakota counties have confirmed positive cases of Southern Rust and Tar Spot this growing season. See our latest recommendations for dealing with these diseases before they become a problem.