The National Elm Trial is a volunteer effort to evaluate and promote the use of Dutch elm disease-resistant American and hybrid elms. This effort grew out of the NCR-193 Agricultural Experiment Station coordinating committee on insects and diseases of woody ornamentals. This group consists of researchers and extension specialists located at land grant universities around the United States.
The National Elm Trial includes seventeen DED-resistant commercially available elm cultivars planted at sixteen evaluation sites in fifteen states. These elm cultivars will be evaluated over a wide range of growing conditions and hardiness zones. This nation-wide study has one coordinating and reporting system that is based at Colorado State University.
Even though many DED-resistant elm cultivars exist and are available in the nursery trade, much of the public is hesitant to purchase and plant any elm tree. While the DED-resistant elm cultivars could enhance the diversity as well as the beauty of urban forests, these cultivars do vary in their response to other biotic and abiotic stresses. Thus, currently available elm cultivars are being planted in large replicated trials in a wide range of environmental conditions across the United States so that their growth and performance can be evaluated.
This web site will report the performance data for trees at the WSU-Puyallup site. For information about all the sites involved, visit the National Elm Trial main site.