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Elm tree with Dutch elm disease

Elm tree with Dutch elm disease

B260/0003

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Credit

DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY. DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY.

Caption

Trunk of an elm tree stricken by Dutch elm disease, showing tracks of a bark-boring beetle, a vector of the fungus, Ophiostoma ulmi, which is the causative agent of Dutch elm disease. The sticky conidia of the fungus adhere to the fertilised female beetles & are deposited under the bark where they germinate. Infection spreads rapidly, but is confined to the water conducting vessels of the tree. The symptoms of the disease are yellowing & browning of foliage followed by wilting, defoliatin & finally death.

Release details

Model release not required. Property release not required.

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