A north-central Iowa farmer saw tar spot close in around him late in the growing season.

Brent Renner of Klemme says he found the foliar disease in nearly every corn field he harvested.

“But I think for us it showed up late enough that fungicide either wasn’t required, or even if it would’ve been a little helpful it wasn’t a devastating tar spot presence that decreased yields significantly.”

Going forward, he tells Brownfield scouting will be crucial.

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