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Pine logs infected with blue stain fungus, Ceratocystis sp.

Pine logs infected with blue stain fungus. Credit: L.D. Dwinell, USDA Forest Service, Bugwood.org<br />Licensed under a <a href="https://creativecommons.org/licenses/by/3.0/us/">Creative Commons Attribution 3.0 License</a>
Credit: L.D. Dwinell, USDA Forest Service, Bugwood.org
Licensed under a Creative Commons Attribution 3.0 License
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