David Orwig, Forest Ecologist at Harvard Forest, will speak in the Hunnewell Building of the Arnold Arboretum on Tuesday, July 12, from 1:30 – 4 pm, on the topic of New England Trees in Decline: The Science Behind the Story. Since 1907, research has been underway at the 3,000-acre property of Harvard Forest, one of the oldest and most intensively studied forests in North America. Scientists, students, and collaborators at the Forest explore topics ranging from conservation and environmental change to land-use history and the ways in which physical, biological, and human systems interact to change our earth. Join Dr. Orwig for this special opportunity to learn about tree decline in New England and to explore ways to reduce and avoid further problems. Dr. Orwig will present information that details ongoing tree decline resulting from a variety of stressors including native and exotic pests and pathogens. Conifer species will be highlighted, but ongoing hardwood tree problems will be included as well. An emphasis will be given to identification of the problem, the mode of tree decline, and appropriate treatment options when applicable. Discussion will include pests such as hemlock woolly adelgid, elongate hemlock scale, red pine scale, Sirex wood wasp, spruce diseases, emerald ash borer, Asian long-horned beetle, and oak decline on Marthaâ€™s Vineyard.Â Note New Date: Postponed from April 5.
Fee $20 Ecological Landscape Association and Arnold Arboretum members, $25 nonmember.Â Co-sponsored by the Ecological Landscape Association and the Arnold Arboretum of Harvard University.Â Register online at https://my.arboretum.harvard.edu or by phone at 617-384-5277.