Survey of hardwood defoliation in the Turtle Mountains, North Dakota
By: by Scott Tunnock.
Contributors: United States. Forest Service. Northern Region. State & Private Forestry.
Series: Insect disease report; Report -- no. 73-19.; Report (United States. Forest Service. Northern Region) -- no. 73-19.
Publisher: USDA Forest Service, Northern Region, State & Private Forestry
Published: 1973
Place of publication: Missoula, Mont
Language: eng
Subjects: Hardwoods -- Diseases and pests -- North Dakota -- Turtle Mountains.; Operophtera -- North Dakota -- Turtle Mountains.; Defoliation -- North Dakota -- Turtle Mountains.
Description: A looper, probably the Bruce spanworm, Operophtera bruceata (Hulst), defoliated more than 15,650 acres of quaking aspen in the Turtle Mountains of North Dakota in the spring of 1973.
Notes: "August 1973."

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