Dutch Elm Disease
Dutch Elm Disease (DED)
Dutch Elm Disease (DED) is an infectious fungal wilt disease that affects American and other types of elm trees. It is spread mainly through root grafts and insect vectors. Our Forestry Department has been working hard to slow the spread of this devastating disease.
Early signs of the disease are visible wilts which usually start to show by mid-June. In late June through mid July, the majority of new infections are identified and they will continue to show through August into mid September. The City staff conducts on-going inspections during this time period. On average 100-150 elms are removed from the boulevards because of DED each year.
Two objectives of the DED program are early detection and prompt removal and disposal of infected and dead elm trees. Infected elms on the boulevard are removed by the Forestry Department. Infected and dead elms on private property are inspected and tagged for removal by the City's Forestry Department. It is the property owner's responsibility to remove tagged elms on private property.