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North Central Research Station |
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The issueRoot disease caused by Armillaria species can damage conifers and hardwoods. These fungi are also important in wood decay and nutrient recycling, and they can survive on a site for many years. Because most of their life cycle is below the surface of the soil, these fungi are difficult to study, and there is much yet to be learned about their roles in the health of our trees and forests. We do know that Armillaria root disease is contributing to the oak decline occurring across upland forests of the Missouri Ozarks and may be contributing to oak mortality in northern Minnesota and spruce decline in northern Wisconsin. What are we doing about it? We are identifying and monitoring Armillaria species associated with decline and mortality in various areas of the region and are using new technologies to identify the species.
We are studying the impact of Armillaria species on oak regeneration in areas of oak decline in the Missouri Ozarks.
Research products Kromroy, K.W. 2004. Identification of Armillaria species in the Chequamegon-Nicolet National Forest
For additional information on this topic, refer to: Williams, R.E.; Shaw, C.G. III; Wargo, P.M.; Sites, W.H. 1986. Armillaria root disease. Shaw C.G., III; Kile, G.A. 1991. Armillaria root disease. Agric. Handb. 691. U.S.Department of Agriculture, Forest Service. 233 p. |
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USDA Forest Service - North Central Research Station |