While hornworms are the largest of the vegetable garden caterpillars, they're also among the hardest to spot. Their pale green color camouflages them as they chomp on the leaves of tomato, potato, and pepper plants. They're not a pest most people want in their garden. To find hornworms, turn your garden hose nozzle to the fine spray setting and direct the spray to a plant. Any hidden hornworms will thrash about and reveal their whereabouts, at which point you can pick them off and drop them into a bucket of water. The hotter the day, the more of a shock the cold spray will be to a hornworm's system.
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Hornworms camouflage themselves well among plants, but can be discovered with a quick hosing.
