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.
01/17/2020 - Minn. crops hit with new diseases
11/11/2019 - Tar spot in corn
10/15/2019 - Tar Spot of Corn Found in Minnesota
09/17/2019 - Tar spot comes to corn
07/19/2019 - Update on Corn Diseases In Indiana: Part 1: Tar Spot
05/15/2019 - Bell: Understanding tar spot in corn
05/14/2019 - Corn tar spot could have ridden in on 'bomb cyclone'
02/14/2019 - Tar spot invasion cuts corn crop yields
09/28/2018 - Tar Spot Continues to Surface in Corn
09/21/2018 - Tar Spot is affecting more Midwest corn
09/07/2018 - Corn Tar Spot Update
08/20/2018 - WANTED: Corn Tar Spot Samples
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