Tar spot is caused by a fungus called Phyllachora maydis that can spread throughout corn fields in the Midwest. This disease was first found in 2015, but has quickly spread throughout Iowa, Illinois, Indiana, Minnesota, Wisconsin, Ohio, Michigan, and Missouri.
Tar spot has moved west quickly as it has infected fields across Missouri, Iowa, and has now been confirmed in some counties in Nebraska. If you’ve had tar spot in your field, you know the damage it can cause. If you’ve been lucky and not gotten it so far, you could still get it.
Tar spot, a fungal disease that can cause severe yield loss
AgVenture published an update on the advancement of tar spot across the Midwest
Tar spot is a fungal leaf disease that infects corn leaves and causes lodging and yield losses.