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Picture library: 19655

HETEROBASIDION ANNOSUM . Cross section discs taken from the butts of various infected trees . Top left Douglas fir , top right sitka spruce , bottom left western hemlock , bottom right European larch . Location: unknown .

Reference: 19655

HETEROBASIDION ANNOSUM . Cross section discs taken from the butts of various infected trees . Top left Douglas fir , top right sitka spruce , bottom left western hemlock , bottom right European larch . Location: unknown .


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Credit line: Forestry Commission

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