Managing Inch Worm Infestations: Find the Source and Spray

What Are Inch Worms?

Inch worms are caterpillars (geometer moth larvae) that move by looping their bodies. They crawl onto porches and into homes seeking food or pupation sites.

Control

Apply a contact insecticide (liquid Sevin or Malathion) directly to the worms. More importantly, locate the host tree or shrub they are feeding on and spray the foliage to eliminate the source population.