Muscadine Leaves Turning Brown

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Senior Member
Anyone know what is causing this? The leaves are turning brown from the outside edges, and going in. This is the only one out of 10 plants that is doing this. I tried to take a pic of the whole vine, but I had to shrink the photo to get it to fit here.


Has anyone sprayed a herbicide in the area? Looks like drift damage.

Hot weather, a lot of herbicides (especially Round up) can off gas and drift a long ways. Found that out the hard way with tomatoes.