Brytten Steed, USDA Forest Service,

Scots pine blister rust

Cronartium flaccidum

Scots pine blister rust (Cronartium flaccidum) is a fungal pathogen of alternating hosts of pine and flowering plants. It is a native of Europe and Asia.

With different life cycle stages completed on different plants, this rust genus causes plant diseases of major economic importance and significant damage. International commerce provides recognized avenues of introduction.

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