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Picture library: 4644

ADELGES PICEAE . Balsam fir , 40 foot in height , showing top gout caused by woolly aphid attack . Birch dieback in foreground . Location: Ingonish , Cape Breton Island , Canada .

Reference: 4644

ADELGES PICEAE . Balsam fir , 40 foot in height , showing top gout caused by woolly aphid attack . Birch dieback in foreground . Location: Ingonish , Cape Breton Island , Canada .


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Credit line: Forestry Commission

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