Dutch Elm Disease fungus ( Ophiostoma sp .) Photo courtesy of WSU Puyallup Plant & Insect Diagnostic... Dutch Elm Disease fungus ( Ophiostoma sp .) Photo courtesy of WSU Puyallup Plant & Insect Diagnostic... Guernsey Elm ( Ulmus minor ‘Sarniensis’) Photo courtesy of University of Washington Botanic Gardens Guernsey Elm ( Ulmus minor ‘Sarniensis’) Photo courtesy of University of Washington Botanic Gardens Dutch elm disease (DED) caused by the fungus Ophiostoma ulmi/novo-ulmi has reestablished itself... Dutch elm disease (DED), caused by the fungus Ophiostoma ulmi/novo-ulmi , has reestablished itself...
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