Texas Tree Authority

Facebook | Tuesday, September 8, 2026

Fall Webworm Nests Are Showing Up in San Antonio Pecan and Oak Trees

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Fall webworms are showing up in pecan and oak trees across San Antonio right now, and the silky nests are hard to miss once they start forming at the ends of branches.

The webbing itself won't kill a healthy, established tree, but a heavy infestation can strip a branch of leaves and stress a tree that's already dealing with our tough summer heat. Newer or already-struggling trees are the ones most at risk.

Removing the nests early, before the caterpillars spread to new branches, keeps the damage contained and the tree looking better through the rest of the season. Pruning out the affected branch tips is usually enough on smaller infestations, without needing a broader treatment. We can take a look and let you know if treatment is needed or if it's just cosmetic.

Have you noticed any of those white, silky webs forming in your trees this year?

#SanAntonioTreeCare


Image / Media Suggestion

A close-up photo of an actual webworm nest in a pecan or oak canopy, ideally paired with a shot of a crew member removing or inspecting it.

Google Drive image folder.

Canva text suggestion: "Webworm Nests Spotted?" or "Protect Your Pecans and Oaks"


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