Fall Webworm on Oak: Limited Control, Tree Will Recover

Webs Protect Caterpillars From Sprays

Fall webworms on your oak are likely in the tents at branch tips. Trunk sprays (Orthene) rarely reach them. The webs are a physical barrier.

Best Approach

• Don’t spray—healthy oaks refoliate after the caterpillars finish their cycle (usually 4-6 weeks).
• Focus on deep watering during hot, dry spells to support regrowth.
• If webs are low enough, tear them open to expose caterpillars to birds.

The secondary “shredded” leaves may be a different caterpillar, but the same logic applies: the tree will recover.