Maple Caterpillars Without Tents: Bt or Tolerate

Caterpillars on maples without tents = various species (not tent caterpillars). Healthy trees tolerate defoliation. Bt works on small larvae.

Options

1. Water/fertilize to support recovery.
2. Bt spray if larvae <1/2" and numerous.
3. No home remedies work.
4. Most trees refoliate fully.

Don't panic—moderate loss is natural.