Chemical Burn or Leaf Spot Disease Peanut Notes No. 185 2024
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Collapse ▲An image of peanuts with classical chemical burn was sent to me. Here is the conversation.
Jordan:
This is chemical burn. Various pesticides can cause this. A lot of Provost Silver is going out right now and there is some burn. It is caused by inerts in the formulation. Provost has gone through various formulations. Assume the spots are toward the top of the canopy where a recent spray was made.
Take a look at Peanut Notes No. 179 from Dan Anco at Clemson.
Follow Up:
I told grower it was a burn, not disease. Saved him from reapplying a fungicide.
Second Person with Similar Issue:
Would you say this is leaf spot? I’m finding this in a field that was sprayed with Provost Silver 12-14 days ago. Not a big deal but we are spraying a fungicide again. Grower has been told it is chemical burn. Herbicide has not been sprayed in 3-4 weeks.
Jordan:
This is chemical burn. Looks like it occurred about the time Provost Silver was applied. Over the years, we occasionally see some burn from this product. It is related to an inert and not the actual fungicide active ingredient.