The Douglas-fir tussock moth in the Northern Region : a cartographic history of outbreaks from 1928 to 1973 Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/0z708x76z

The Douglas-fir tussock moth, Orgyia pseudotsugata McD., periodically defoliates Douglas-fir, true firs, and other host trees in forests of the western United States. In the Northern Region, these infestations occur about once every decade. This history covers the earliest recorded outbreak in northeastern Washington from 1928 to 1930 and includes information about outbreaks in northern Idaho and eastern Washington from 1944 to 1947, northeastern Washington and northern Idaho from 1950 to 1955, northern Idaho and western Montana from 1961 to 1965, and the current outbreak in northern Idaho, northeastern Washington, and western Montana which began in 1970. These outbreaks usually last from 2 to 4 years in forested areas and typically go through a buildup phase the first year, an outbreak phase the second year, and a declining phase the third year due to parasites and/or polyhedrosis virus. Exceptions are: It may take an outbreak 2 years to build up or occasionally natural control agents can cause a population collapse at the end of the second year.

Descriptions

Attribute NameValues
Creator
Resource Type
Date Available
Date Issued
Series
Subject
Rights Statement
Publisher
Language
File Format
File Extent
  • 14672287 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
Additional Information
  • description.provenance : Submitted by Adam Powell (powella@onid.orst.edu) on 2006-10-30T21:21:30Z No. of bitstreams: 1 no. 73-27_ocr.pdf: 14672287 bytes, checksum: 5a1db77252e318f852da4bfa8107438f (MD5)
  • description.provenance : Made available in DSpace on 2006-10-31T22:46:59Z (GMT). No. of bitstreams: 1 no. 73-27_ocr.pdf: 14672287 bytes, checksum: 5a1db77252e318f852da4bfa8107438f (MD5) Previous issue date: 1973
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2006-10-31T19:55:17Z (GMT) No. of bitstreams: 1 no. 73-27_ocr.pdf: 14672287 bytes, checksum: 5a1db77252e318f852da4bfa8107438f (MD5)
  • description.provenance : Approved for entry into archive by Laura Wilson(laura.wilson@oregonstate.edu) on 2006-10-31T22:46:58Z (GMT) No. of bitstreams: 1 no. 73-27_ocr.pdf: 14672287 bytes, checksum: 5a1db77252e318f852da4bfa8107438f (MD5)

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items