What’s wrong with the trees in St. Bonifacius?

On my drive to work every day I travel through St. Bonifacius. A bit ago I started noticing a few trees that had dead spots. As the weeks went on, the disease spread on to more and more trees. What’s wrong with the trees?

St Boni Trees

I’ve thought of drought and chemicals but only parts of the trees are dying and the crops right next to the trees seem fine. They aren’t changing colors and the leaves aren’t falling off. So what’s happening?

Any thoughts?

Whatever it is, I hope it says away from Waconia.