Help us locate a "survivor" American elm tree
Researchers at the Northern Research Station, NRS-04, Delaware, Ohio would like to expand current efforts to screen American elm trees that may be tolerant or resistant to Dutch elm disease (DED). To facilitate this effort we are asking for the help of state foresters, park employees, and the interested public to identify large American elm trees on their landscapes.
American Elm Tree Selection Criteria:
- A tree in good health of at least 24 inches diameter at breast height (DBH) [Learn how to measure DBH]
- Located in an area where dead or dying American elms are within about one mile of identified tree
- The identified tree would not have been treated with fungicides to prevent DED
For additional reference, you may wish to review the following publications: