Holden Arboretum

Eastern Hemlock (tsuga Canadensis) Is an Important Forest Tree in North America, With a Range Extending From Northeastern Canada to the Southern Appalachian Mountains and From the Eastern Coast of North America to the Upper Mid-west. Eastern Hemlock Is Affected by the Non-native Invasive Insect Hemlock Woolly Adelgid Which Has Caused the Dieback and Loss of Hemlock Trees Across Much of the Southeastern and Mid-atlantic States. Management Strategy Focuses on Pesticide Applications But Their Effectiveness Declines Over Time and Is Impractical for the Treatment of Entire Forests.the Purpose of This Agreement Is to Develop a Quantitative, Reproducible Test for Hemlock Woolly Adelgid Resistance, Early Flowering Treatments, and Efficient Vegetative Propagation Methods. Propagate Hemlock Trees That May Have Resistance, Promote Early Flowering, and Distinguish Resistant From Susceptible Trees Provide the Foundation for Selection, Breeding, and the Development of Improved Seed Orchards.