Pin Oak Leaf Curling: Insect or Vascular Disease? Need for Close-Up Photos

Pin Oak Leaf Curling: Insect or Vascular Disease? Need for Close-Up Photos

Pin oak leaves: vascular tissue engorged/brittle, leaves curl into dead balls. Tree otherwise healthy. Caught early.

Need Photos

Please send close-ups of symptomatic leaves (in focus).

What to Check

1. Unroll green curled leaves—look for tiny insects, webs.
2. Inspect trunk/root collar for loose bark, wounds.
3. Note tree size and trunk diameter.

Possible Causes

• Gall insects (midges, wasps) cause curling.
• Mites (eriophyid) cause distortion.
• Vascular wilt (rare in oaks).

Photos will narrow it down. Insects are common cause of curling.