摘要：The long-term sustainability of the eastern North American conifers eastern hemlock (Tsuga canadensis [L.] Carriére) and Carolina hemlock (T. caroliniana Engelmann) is threatened by the exotic insect hemlock woolly adelgid (Adelges tsugae Annand; HWA). The integrated pest management strategy to mitigate HWA impacts on hemlock ecosystems includes a cooperative genetic resource conservation program being conducted by Camcore (International Tree Breeding and Conservation Program at North Carolina [NC] State University) and the U.S. Department of Agriculture (USDA) Forest Service Forest Health Protection. Through the first 10 years of this project (2003 to 2013), seeds have been collected from 60 populations of eastern hemlock and 19 populations of Carolina hemlock in the United States, representing 451 and 134 mother trees, respectively. Seeds have been distributed to the Camcore seed bank in Raleigh, NC, and the USDA Agricultural Research Service National Center for Genetic Resource Preservation in Fort Collins, CO, for long-term storage, and to forest nurseries in Brazil, Chile, and the United States, where seed orchards have been established.
