Word: ceratostomella
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Dates: during 1950-1959
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Named after the Dutch pathologist who first described it, the disease is caused by a fungus, Ceratostomella ulmi, which is introduced into the trees by an unattractive European elm bark beetle, Scolytus multistriatus. Toxins and gummosis produced by the fungus in the tree's water-conducting vessels may kill it in six months. Once disease is detected, death may be retarded, somewhat as in cancer, by removing more and more of the affected parts. Widespread use of preventative measures, such as burning old or dying trees to kill the beetles, or spraying and feeding the trees to discourage inhabitation, have...
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