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Photo#1730787
Grape leaf

Grape leaf
Longview, Gregg County, Texas, USA
September 21, 2019
Some sort of insect has folded over the leaves of Vitis cinera.

I'm guessing...
a critter I've never heard of or seen, the grape leaffolder Desmia funeralis. The University of Florida Featured Creatures page says
Quote:
Injury to the leaves is very characteristic and may be easily recognized. As soon as a larva is large enough it folds the leaf, exposing the under surface; the edge is held in place by bands of silk thread. It is within the protection of this fold that the larva feeds, skeletonizing the leaf of the upper surface. When the larvae are numerous, the injury to the vine becomes conspicuous, even at a considerable distance, because the light color of the under surface of the folded leaves contrasts boldly with the dark green of the upper side normally presented, thus giving the vine a patchy appearance. Larvae roll muscadine leaves, which are thinner than bunch grape leaves.

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