Exotic Pest Reporting
Purdue Botany and Plant Pathology - photo Kiersten Wise
Corn tar spot
Corn tar spot (Phyllachora maydis) is a fungal pathogen of corn. It is a native of Mexico, Central and South America and was first detected in Indiana in 2015.
Suitable environmental conditions of temperature, relative humidity and/or rainfall are required for the sequence of infections that results in the blight on maize.
09/26/2016 - Tar Spot on Corn Confirmed in Indiana in 2016
10/23/2015 - Phyllachora maydis (black spot of maize)
10/19/2015 - Tar Spot on Corn Confirmed in the United States