Indiana CCA Conference 2019 Presentation



Pest Management
Wed, Dec 18, 2019
8:00am to 8:50am


Pest Management
Wed, Dec 18, 2019
1:00pm to 1:50pm


Tar spot of corn, caused by Phyllachora maydis, is a new and emerging disease in Indiana and the upper Midwest. In 2018, it had a significant yield impact on corn production in northern Indiana. Tar spot was first observed in 2015, in both Indiana and Illinois, and has since been confirmed in Florida, Iowa, Michigan, Minnesota, Missouri, Ohio, and Wisconsin. 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 management. Unfortunately, there is limited information on the biology of the pathogen(s) that causes tar spot, as well as the epidemiology and management of this disease.  A summary of 2019 research results will be presented as we continue to improve our understanding of this new disease in corn.


Darcy Telenko

Assistant Professor, Field Crops Pathologist
Purdue University

Dr. Darcy Telenko is an assistant professor and Field Crop Extension 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 11 peer-review articles and over 100 Extension publications. Her program currently has three students working on MS or PhD degrees, one visiting scholar, and three undergraduates studying Plant Pathology.