osakensis. Hemlock woolly adelgid is established in isolated locations in the western Lower Peninsula of Michigan. CONTROL OF HEMLOCK WOOLLY ADELGID An experiment was conducted during 1987 in Gillette Castle State Park located in East Haddam (Middlesex County) and Hadlyme (New London County) Connecticut to determine the effectiveness of chemical pesticide sprays for controlling hemlock woolly adelgid on eastern hemlock. ), Implementation and status of biological control of the hemlock woolly adelgid. The easiest way to identify hemlock woolly adelgid is to look at hemlock shoots for the white “wool” the adelgid produces while feeding. For copies of this publication or information concerning hemlock woolly adelgid, contact Dr. Scott Hemlock Woolly Adelgid. Insecticidal soaps and horticultural oils are effective for HWA control … 2002. Biological control programs have released natural enemies of hemlock woolly adelgid to aid in control at the landscape level. These quarantines impact sales and shipment of hemlock trees from nurseries as well as other hemlock products. In March when studies were initiated, trees were heavily infested and … We currently house two colonies of Laricobius beetles, one of La. An overview and outlook for biological control of hemlock woolly adelgid, pp. As of May 2017, hemlock woolly adelgid (also referred to as HWA) had been found in localized areas of Allegan, Muskegon, Oceana and Ottawa counties, and additional surveys are underway. Each little white ball of wool, called an egg sac, is actually wax secreted by an adelgid. The hemlock woolly adelgid is a tiny, aphid-like insect that is ravaging hemlocks from Maine to Georgia. nigrinus and one of La. Biological Control. This publication contains information on the native range of hemlock and range of hemlock woolly adelgid, the importance of hemlocks in eastern forest ecosystems, and on hosts, life cycle, control, and population trends of the hemlock woolly adelgid. Biological Control for Hemlock Woolly Adelgid: Where Do We Stand? HWA became a pest of concern in the late 1980s as it spread into natural stands. In: Proceedings of the Third Symposium on the Hemlock Woolly Adelgid in the Eastern United States, Feb.1-3, 2005, Asheville, North Carolina. Hemlock Woolly Adelgid, Pest Alert; Life Stages of the Hemlock Woolly Adelgid in the Northern Range – 2002 (pdf) Biological Control. While predators in Asia and the Western US naturally control HWA, no such predators are present in the range of eastern and Carolina hemlocks. Native to Asia, the hemlock woolly adelgid, or HWA, is an invasive, aphid-like insect that attacks North American hemlocks. Quarantine restrictions on hemlock are in place in some regions of the United States and Canada. Assessments of biological control of hemlock woolly adelgid with Sasajiscymnus tsugae in Connecticut and New Jersey. However, these species may not be adaptable to New Jersey conditions. The personal interactions provided the cooperators' information for management decisions about the control of hemlock woolly adelgid in each state. Acknowledgments Western hemlock species (T. heterophylla, T. mertensiana) tend to be tolerant or resistant to Hemlock Woolly Adelgid. No effective native predators offer reliable control of Hemlock Woolly Adelgid. The family Chamaemyiidae includes two subfamilies, about 20 genera and subgenera, and an estimated 100-150 species worldwide. The adelgids feed at the base of the needles, where the needles attach to the woody portion of the shoot. Onken, B. and Reardon, R. (Compilers) FHTET 2005-01 pp. However, these species may not be adaptable to New Jersey conditions. The woolly adelgid is considered a serious threat to species of eastern hemlocks and to the overall health of forest and river ecosystems. (eds. USDA Forest Service, Forest Health Technology Enterprise Team, FHTET-2011-04, Washington, D.C. [Google Scholar] Orwig D. A. A review of insect biology, description of life stages, … It now threatens the entire hemlock population of the eastern United States. This publication contains information on the native range of hemlock and range of hemlock woolly adelgid, the importance of hemlocks in eastern forest ecosystems, and on hosts, life cycle, control, and population trends of the hemlock woolly adelgid. The hemlock woolly adelgid, Adelges tsugae (HWA), a tiny sap-sucking insect related to aphids, is causing widespread death and decline of hemlock trees in the eastern United States. The beetle, a species called Laricobius nigrinus, is a predator of the Hemlock Woolly Adelgid, an invasive insect from Asia that has wreaked havoc on many hemlock forests in the eastern United States. It is widely recognized that biological control of hemlock woolly adelgid with HWA predator beetles is the key to restoration and recovery of hemlocks in the eastern US. Western hemlock species (T. heterophylla, T. mertensiana) tend to be tolerant or resistant to Hemlock Woolly Adelgid. Biological Control of Hemlock Woolly Adelgid in the Eastern United States – McClure, FHTET-2000-08, Jan. 2001 (pdf) Biological Control of Hemlock Woolly Adelgid – USDA Forest Service, FHTET-2004-04