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Picture library: 2004714

Ceratocystis ulmi.  Root transmission in Wheatley elms. Centre tree inoculated.  Right hand tree diseased through root graft transmission.

Reference: 2004714

Ceratocystis ulmi. Root transmission in Wheatley elms. Centre tree inoculated. Right hand tree diseased through root graft transmission.
Date Taken: 15th August 1974

Photographer: B. J. W. Greig
Copyright: Crown Copyright
Credit line: Forestry Commission / B. J. W. Greig

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