White Oak Progressive Branch Dieback: Internal Decay Suspected

Older white oak in Michigan shows June browning starting 5 years ago—one branch, then more each year, not same branches. Leaves persist until fall. Insecticides, iron, fertilizer failed.

Likely Internal Decay

Progressive, spreading dieback over years suggests wood decay fungi. Check trunk for loose bark, cavities, conks. Condition worsening annually.

Urgent Professional Evaluation

Contact county Extension or certified arborist (not door-to-door tree services) for on-site assessment. Structural failure risk increases with decay progression. Do not delay.