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Trunk canker from stalactiform rust, Peridermium stalactiforme =Cronartium coleosporioides, on pine tree.

Lower trunk of a pine tree with an elongate canker and dead limbs in a forest. Credit: USDA Forest Service, Northern and Intermountain Region, Bugwood.org — Credit: USDA Forest Service, Northern and Intermountain Region, Bugwood.org

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