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Picture library: 2004494

Ceratocystis ulmi.Diseased twig showing streaking in the outer wood with healthy twigs for comparison.

Reference: 2004494

Ceratocystis ulmi.Diseased twig showing streaking in the outer wood with healthy twigs for comparison.
Date Taken: 15th September 1971

Photographer: T. K. Evans
Copyright: Crown Copyright
Credit line: Forestry Commission / T. K. Evans

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