It is important to continue to scout for diseases in both corn and soybeans. Recent rains have created favorable environmental conditions for the development of foliar diseases in both crops.
Darcy Telenko
Corn growth stages are quite variable across Indiana but a number of areas with early planted corn about waist high.
Wheat is starting to head out across the central and northern Indiana, with flowering not too far behind.
In Indiana, tar spot has been an annual concern since 2018 when growers experienced 20-60 bu/A loss.
Farmers and crop specialists: please help us with a tar spot and fungicides survey
Tar spot continues to be found in Indiana and our first confirmation of southern corn rust happened this week (Figures 1 and 2).
Yes, we have found active tar spot in Indiana.
Thanks for listening to Purdue Crop Chat, a regular podcast from Hoosier Ag Today and the Purdue University Extension Service, featuring Purdue Extension soybean specialist Dr. Shaun Casteel and Extension Corn Specialist Dr. Dan Quinn.
Due to its relatively recent U.S. discovery and its ability to cause significant production and economic losses, tar spot is often a topic of angst and anxiety amongst corn farmers and agronomists in Indiana.
It is important to monitoring for diseases to make an informed decision if a fungicide is necessary.
Pest&Crop newsletter -
Department of Entomology
Purdue University
901 Mitch Daniels Blvd
West Lafayette, IN 47907
© 2025 Purdue University | An equal access/equal opportunity university | Copyright Complaints | Maintained by Pest&Crop newsletter
If you have trouble accessing this page because of a disability, please contact Pest&Crop newsletter at luck@purdue.edu.