1. A caterpillar larva of various moths that travels in large groups and causes damage to crops and grasses.
Usage: Often used in agricultural and entomological contexts.; Named for the army-like behavior of moving in masses.

Examples

• Farmers in the region reported an armyworm infestation that destroyed thousands of acres of corn.
• The armyworm larvae feed voraciously on grass and cereal crops during the growing season.
• Entomologists recommend monitoring fields for armyworm activity in late summer.
• An armyworm outbreak can cause significant economic losses if not controlled early.
• The pest control team sprayed insecticide to combat the armyworm population.