Oak White Floss on Leaf Undersides: Insect/Spider Silk, Need Photos

Observations

Pure white flossy material on cupped leaf undersides + twig junctions, sticky, moves in breeze + closed galls on leaf tops = likely insect or spider silk, not fungal. Fungi don't produce that much floss.

Next Steps

1. Email photos: jdcawly@mckendree.edu (close-ups).
2. Entomologist referral: Expert will consult colleague.
3. Monitor: Check for live insects in floss.

Possibilities

• Spider egg sacs / silk.
• Mealybug/woolly aphid colonies.
• Eriophyid mite "erineum" (but usually on tops).

This requires visual ID. Photos will enable precise diagnosis and treatment.