Other names: Tar Spot of Corn, Phyllacohra maydis
Where did it come from?
Tar spot is a pathogen from Central and South America that was first found in North America in 2015 in Indiana and Illinois.
Why is it invasive?
It produces small raised black spots in leaves and can cause yield loss.
Resources:
Seen it? Report it! Through the app or online.
Image credit: Daren Mueller, Iowa State University, Bugwood.org