Field Guide to Diseases and Insect Pests of Idaho and Montana Forests

Susan K. Hagle – Plant Pathologist,
Scott Tunnock – Entomologist (retired),
Kenneth E. Gibson – Entomologist, and
Carma J. Gilligan – Biological Technician.

U.S. Department of Agriculture, Forest Service, State and Private Forestry, Northern Region, P.O. Box 7669, Missoula, Montana 59807. 1987. Reprint 1990. Publication Number R1-89-54.

Acknowledgements

Our thanks to Linda Hastie of Northern Region, State and Private Forestry, for content design and typesetting. We extend our appreciation to the following people for their technical review of the manuscript: Wayne E. Bousfield, James W. Byler, Jerald E. Dewey, Lionel D. Hall, Robert L. James, John H. Thompson, and Lawrence E. Stipe of USDA Forest Service, Northern Region, State and Private Forestry; R. Ladd Livingston and John W. Schwandt of Idaho Department of Lands; and Steven Kohler of Montana Department of State Lands. Numerous photographs were generously provided by Catherine A. Stewart of USDA Forest Service, Missoula Ranger District, Lolo National Forest; Mark D. McGregor of USDA Forest service, Northern Region, State and Private Forestry (retired); James Hoffman and Ralph E. Williams of USDA Forest Service, Intermountain Region, State and Private Forestry; J. W. Byler, J. E. Dewey, R. L. James, Steve Kohler, R. Ladd Livingston, and John W. Schwandt.

Cover photographs: Left, conk of the velvet top fungus, the cause of Schweinitzii root and butt rot; right, larvae of Douglas-fir bark beetles in cambium of host.

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