You can get rid of tomato hornworms, gypsy moth larvae, bagworms, armyworms, and other harmful insect larvae by removing them with your gloved hands. Take extra precautions getting rid of tent caterpillars, as they have tiny hairs that can inflict itchy, painful rashes. collect their webs or nests, with gloved hands, drop them into a bag, tie it off, and dispose of them.