But the disease was nearly a no-show in those ... “In 2021 we saw tar spot early on the corn-on-corn crops first,” he recalls. “But once it fired up, it was everywhere.

As you scout and think you’ve found the disease, an easy way to confirm what you’re dealing with is to take your hand and try to wipe the tar spots off the corn plants (gloves are recommended).

On extremely hot and dry days, an irrigation event can decrease canopy temperature close to 50 degrees Fahrenheit. Relative ...

Farmers must stay vigilant to protect their crops from a variety of diseases that threaten yield and quality. One persistent challenge is tar spot, a fungal disease that has become ...

The South Dakota State University Plant Diagnostic Clinic helps producers, gardeners and homeowners assess possible diseases ...

Gray leaf spot, caused by the fungus Cercospora zeae maydis is the most significant yield-limiting disease of corn worldwide [1]. The disease was first reported in Illinois in 1924, and has increased ...