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Brown Ooze on Live Oak: Borer Infestation, Fertilize to Boost Vigor

Brown stuff
Tree

Live oak in coastal Florida panhandle oozes brown frass—sign of borers (likely beetles). Treat trunk with Merit or Onyx (systemic insecticides). Borers attack stressed trees; fertilize with 10‑10‑10 at 1 lb per inch trunk diameter now and again in spring to improve health. Deck on pillars avoided root damage, but monitor for further stress.

Trees: Assessing Oak Trunk Decay: When to Worry About Heart Rot; Live Oak Sewer Line Trench: Tunnel or Accept Dieback; Live Oak Roots Damaging Foundation: Barrier and Pruning Options; Old Oak Cavities: Don't Fill, Fertilize for Health; Diagnosing and Treating Sap-Oozing Oak Trees; Early Care for Young Live Oak Trees in Texas; Oak Tree Cavity Assessment: When Holes Indicate Hazard; Decay Fungus on Shumard Oak: What the Mushroom Means; Young Oak with Trunk Canker and Bronze Leaves: Poor Prognosis; Storm-Split Oak: Salvage or Remove?

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