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Yellow-striped Armyworm Moth Caterpillar
Montpelier Estate, Home of James & Dolly Madison
The Yellowstriped Armyworm (Spodoptera ornithogalli), a moth caterpillar, feeds on a variety of crops including alfalfa, bean, beet, cabbage, clover, corn, cotton, cucumber, grape, grass, morning glory, onion, pea, peach, peanut, sweet potato, tobacco, tomato, turnip, wheat, and watermelon.
The insect usually overwinters as a pupa in the soil but may possibly overwinter as a partially grown caterpillar. Egg masses are deposited on foliage, trees, or buildings. There are three to five generations per year. Yellowstriped armyworms feed during the day.
Here's a helpful article on Armyworm control.