The Hemlock Woolly Adelgid Situation in Michigan: What We Are Learning About HWA Development, Impacts and Control Options

Jan 23 2018 - 9:00am

Established populations of hemlock woolly adelgid (HWA) continue to be identified in west Michigan. We monitored development and densities of HWA in 2016-2017 to identify the onset and peak of different life stages.  We established a trial to evaluate systemic insecticide options in an area with many infested trees.  Effects of these products and condition of treated and untreated trees continues to be monitored.  Microsite variation in winter temperatures experienced by HWA were monitored in 2016-2017 and are again being tracked this winter to assess possible effects of cold on HWA survival.  

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Michigan State University

Deborah G. McCullough, a native of Flagstaff, Arizona, holds graduate degrees in Forestry (M.S., Northern Arizona University) and Entomology (Ph.D., University of Minnesota). She is a Professor with a joint appointment in the Dept. of Entomology and Dept. of Forestry at Michigan State University, with research, extension and teaching responsibilities. Dr. McCullough’s research focuses on the ecology, impacts and management of forest insects, including invasive pests such as emerald ash borer, beech bark disease, and most recently, hemlock woolly adelgid. She works with forest managers, regulatory officials, arborists and private landowners to develop sustainable management strategies to protect forests from damaging populations of forest insects. McCullough has published more than 100 papers about forest insect ecology and management in scientific journals, along with more than 200 extension bulletins and articles. She is a member of the national Forest Research Advisory Committee to USDA, the Michigan Interagency Forest Invasives Committee and frequently provides advice on forest insect management to state, municipal and private landowners.