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Dutch Elm Disease: Ophiostoma novo-ulmi; O. ulmi The rise of Dutch Elm Disease has been a devastating event in the history of tree diseases. It is caused by the fungi Ophiostoma novo-ulmi and O. ulmi and is vectored by bark beetles. The disease is referred to as "Dutch" Elm Disease because it was first described in
26 Νοε 2024 · Dutch elm disease (DED) is a fungal disease that affects the vascular system of elm trees and causes crown dieback and tree mortality.
Distinguishing Dutch Elm Disease From Other Problems. Other pest problems commonly observed on elm include leaf spot diseases, which cause dark spots of dead tissue in the leaves, and elm leaf beetles, which eat holes in the leaves. These problems are easily distinguished from DED.
Dutch Elm Disease (DED) is a devastating disease of elms caused by two fungal species Ophiostoma ulmi and Ophiostoma novo-ulmi . The fungus spreads through the tissues of susceptible elms and blocks
In the 1930s Dutch elm disease (DED) was accidentally introduced from Europe into the United States. It had a devastating impact on American elm (Ulmus americana) and its relatives in urban and riparian environments.
See the Elm Bark Beetles entry in this guide for more information. Hosts—This disease affects trees in the elm family (Ulmaceae). Native elms are most susceptible. Signs and Symptoms—Symptoms differ between trees that are infected through root grafts and those infected via beetles.
Communities must, therefore, develop a unified, comprehensive, and sustained program to manage Dutch elm disease throughout all private and public sectors. Program development should be based on a fundamental under standing of the disease and its management.
