2 articles tagged "corn tar spot".


Author: Darcy Telenko We are collecting corn tar spot samples and we need your help! Tar spot of corn is a new corn disease first identified in the United States in 2015 in Illinois and Indiana. It has since been confirmed in Iowa, Michigan, Wisconsin, and Florida. What to look for: Small, black, raised spots (circular or oval) develop on infected plants, and may appear on one or both sides of the leaves, leaf sheaths, and husks. Spots may be found on both healthy (green) and dying (brown) tissue. Often, the black spots are surrounded by a tan or brown halo; this is especially obvious on healthy leaves (see images). The University of Illinois needs samples of corn infected with tar spot from across the United States as part of a new research project investigating the variability of populations of the corn tar spot pathogen. We would also like to[Read More…]


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