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Dry pellets of frass (excrement) of tomato hornworm, Manduca quinquemaculata, on the ground beneath a caterpillar-infested plant.

Dry pellets of frass (excrement) of tomato hornworm on the ground beneath a caterpillar-infested plant.; Colorado Credit: Whitney Cranshaw, Colorado State University, Bugwood.org<br />Licensed under a <a href="https://creativecommons.org/licenses/by/3.0/us/">Creative Commons Attribution 3.0 License</a>
Credit: Whitney Cranshaw, Colorado State University, Bugwood.org
Licensed under a Creative Commons Attribution 3.0 License
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