Question of the Week – Fungicide Killing Plant Disease

Last week in the photo, Dr. Bob Kemerait had a slide with lots of good info about sites where fungicides kill plant diseases. He was discussing different modes of action of fungicides and he was saying that we have some good chemistry now to combat and prevent plant diseases and that’s a good thing. But we need to rotate chemistry to prevent resistance problems.

 

This week I have a photo that local machinist and cattleman, Bob Youmans, gave me.  He asked me what this is and what is causing it?  So let me know what you think.