Holden Arboretum

The Goal Is to Better Understand the Dynamics of Tree Populations Affected by Invasive Pests and to Develop Methods to Identify, Propagate and Breed Trees With Improved Genetic Resistance to Such Pests. a Focused Effort on Four Trees Species of Critical Importance to Northern Temperate Forests of the Great Lakes Region: 1 Ash Species Which Are Threatened by the Invasive Emerald Ash Borer 2 American Beech Trees Which Are Threatened by Beech Bark Disease Caused by the Beech Scale Insect as Well as Beech Leaf Disease the Nematode Associated With This Disease; 3 Eastern Hemlock Which Are Threatened by the Invasive Insect Hemlock Wooly Adelgid and Elongated Hemlock Scale 4 American Elm Which Is Threatened by Dutch Elm Disease. the Funds Will Continue the Production of Superior Pest-resistant Trees and Seed Sources for Use in Forest Restoration Plantings by Both Public and Private Landowners Across the Great Lakes Basin.