Evaluation of a hemlock sawfly outbreak in the northern tip of Idaho, 1985

Public Deposited

Citeable URL: https://ir.library.oregonstate.edu/concern/defaults/c534fq358

Descriptions

Attribute Name	Values
Creator	Tunnock, Scott United States. Forest Service. Northern Region
Abstract	A rare outbreak of hemlock sawfly, Neodiprion tsugae Middleton, was detected in August in drainages near the Canadian border in Idaho infesting several thousand acres. Some stands of western hemlock and subalpine fir were severely defoliated. Understory Engelmann spruce trees were lightly defoliated. The sawfly overwinters in the egg stage within current needles. Very few eggs could be found during a survey in October. Some hemlock trees may be topkilled, but natural control agents usually cause these sawfly outbreaks to collapse in 1 or 2 years. No control action was recommended.
Resource Type	Technical Report
Date Available	2006-11-29T16:26:09+00:00
Date Issued	1985
Series	Forest pest management
Subject	Report (United States. Forest Service. Northern Region. Forest Pest Management) Conifers -- Diseases and pests -- Idaho Hemlock sawfly -- Idaho
Rights Statement	Copyright Not Evaluated
Publisher	Missoula, Mont. : USDA Forest Service, Northern Region
Language	English [eng]
File Format	application/pdf
File Extent	763795 bytes
Digitization Specifications	Scanned at 600 DPI using a Cannon DR-9080C in TIF format. PDF generated through Capture Perfect using OmniPage Professional 15 for textual OCR.
Replaces	http://hdl.handle.net/1957/3544

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