Indiana CCA Conference 2020 Presentation

Tar spot of corn, caused by Phyllachora maydis, is a newly established disease in Indiana corn. It has had significant yield impacts on corn production in northern Indiana. The 2018 tar spot epidemic was the first time yield losses were documented in the U.S. Prior to this epidemic; no field research had been done in North American for tar spot. A summary of our experiences in Indiana will be presented, including an update on 2020 research, as we continue to improve our understanding of this new disease in corn.


Darcy Telenko

Assistant Professor, Extension Field Crops Pathologist
Purdue University

Dr. Darcy Telenko is an assistant professor and Extension Field Crop Pathologist with the Department of Botany and Plant Pathology at Purdue University. She has statewide responsibility for Plant Pathology research and Extension in agronomic crops. Her interdisciplinary plant pathology research ( and Extension program ( is involved in studying the biology and management of soilborne and foliar pathogens. The program is focused on recognizing and understanding new diseases and their potential impact on
Indiana agriculture, and quickly and effectively distributing information in the event of a disease threat to Indiana crop production. Dr. Telenko is a native of western New York and received her BS in Biological Sciences at Cornell University, MS in Plant and Soil
Science at Southern Illinois University, and PhD in Plant Pathology and Crop Sciences at North Carolina State University. Prior to Purdue, Dr. Telenko was an Extension Vegetable Specialist for the Cornell Vegetable Program at Cornell University, and was a
post-doctoral researcher at both the University of Florida and Virginia Tech. She has published 18 peer-review manuscripts and over 100 Extension publications. Her program currently has four graduate students working on MS or PhD degrees in Plant
Pathology, one visiting scholar, and two undergraduates studying Plant Pathology.