An agronomist with AgriGold says many farmers have tar spot on their mind. Brian Weihmeir, who covers central Illinois, says ...

A late August wave of heat and humidity flipped the story on tar spot for agronomist Dennis Kopp. “In 10 days, since the first of September, it’s been magnified 100%,” Kopp says. He runs a ...

A new disease is plaguing cornfields across the Midwest. Phyllachora maydis is the fungus that causes a corn disease called tar spot. The fungus creates black spots on corn leaves and husks and ...

Tar spot decimated many central Illinois cornfields in 2021. But the disease was nearly a no-show in those same fields this past year. One farmer recently asked Ken Ferrie, “What kind of risk do ...