In a few years, tar spot has surfaced as a main concern in several key states. The corn disease stole upwards of 60 bu. per acre in severely infected fields in 2022, per Purdue University Extension.

If you’re a corn producer, you know how Tar Spot has reared its ugly head over the past several growing seasons. That’s why ...

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 ...