Forest tent caterpillar (Malacosoma disstria)
Western tent caterpillar (Malacosoma californicum pluviale)
Pest description and damage The western tent caterpillar and forest tent caterpillars form tents as soon as they hatch from the eggs and immediately begin to build a small tent. Watch for the white glint of the small tents about when apples bloom. Western tent caterpillars are hairy, dull yellow-brown, with rows of blue and orange spots on the body. Forest tent caterpillars are black and blue with dorsal white footprints.
For biology, life history, monitoring and management
See "Caterpillar" in:
See Table 2 in: