Live Oak Bark Shedding: Borer Infestation Under Stress

Bark Loss = Borer Entry Points

Progressive bark shedding on 100″+ diameter live oak indicates borers exploiting stress (drought, nutrient deficit).

Two‑Step Fix

1. Spray trunk with bifenthrin (Onyx) or imidacloprid (Merit) now and again late summer.
2. Fertilize: 1 lb 10‑10‑10 per inch trunk diameter, watered in. Repeat fall.

Healthy oak resists borers; stressed oak attracts them.