Answer: Tomato hornworms are big and green with white stripes on their sides and a pointy 'horn' on the back. They are the larval stage of a large brown or gray moth with stripes on their wings. The adults have a 4"-5" wingspan and feed at twilight. The white butterflies could be adult cabbage moths, especially if they have a charcoal gray or black dot on each wing. They are not related, but both are considered pests in the vegetable garden. Hand pick the caterpillars if you find them on tomato, cabbage, broccoli, or cauliflower plants.
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