You’ve been watching your arborvitae all summer and noticing brown, spindle-shaped sacs hanging from the branches.  Someone points out to you that these are bagworms, a case-making caterpillar that feeds on leaves and can be highly damaging, especially to evergreen trees and shrubs like arborvitae and cedar. Now it’s late September, what do you do? Before I answer that question, it’s worth pointing out that bagworms are interesting insects with a decidedly non-traditional life cycle. Bagworms are not really worms, but caterpillars, the immature stages of a nondescript moth.  They… Read More →