2016 Project Abstract For the Period Ending June 30, 2019 PROJECT TITLE: Dutch Elm Disease Resistance – Phase II PROJECT MANAGER: Robert A. Blanchette AFFILIATION: University of Minnesota MAILING ADDRESS: Department of Plant Pathology, 495 Borlaug Hall, 1991 Upper Buford Circle CITY/STATE/ZIP: St. Paul, MN 55108 PHONE: 612-625-0202 E-MAIL:
[email protected] FUNDING SOURCE: Environment and Natural Resources Trust Fund LEGAL CITATION: M.L. 2016, Chp. 186, Sec. 2, Subd. 06f APPROPRIATION AMOUNT: $200,000 AMOUNT SPENT: $200,000 AMOUNT REMAINING: $0 Sound bite of Project Outcomes and Results Dutch elm disease continues to devastate Minnesota’s urban and forested elm species. Results from our research provided new data on resistance mechanisms in DED resistance elm selections, we identified, propagated, and screened 46 genotypes in order to increase the diversity of DED resistant elms available and developed enhanced propagation techniques. Overall Project Outcome and Results After nearly a century since its introduction, Dutch elm disease (DED), caused by the fungal pathogen Ophiostoma novo-ulmi, remains a critical threat to elm populations in Minnesota. This iconic species has long been regarded as one of the most resilient and adaptive species for the upper Midwest, tolerating salt, pollution and many other stresses better than other trees. Elm also play a vital part in the ecology of Minnesota’s forests, providing important food and habitat for wildlife, are excellent trees for wetlands and add to the biodiversity of a healthy forest. Combating this disease has been expensive and very difficult. Resistance to DED has been proven in American elm, however, it is poorly understood and a limited number of selections are available.