Monitoring larval populations of the Douglas-fir tussock moth and the western spruce budworm on permanent plots
Subtitle: sampling methods and statistical properties of data
By: R.R. Mason and H.G. Paul.
Contributors: Paul, H. Gene.; Pacific Northwest Research Station (Portland, Or.)
Series: General technical report PNW -- GTR-333.; General technical report PNW -- 333.
Publisher: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station
Published: 1994
Place of publication: Portland, Or
Language: eng
Number of pages: 23
Subjects: Douglas-fir tussock moth.; Western spruce budworm.; Trees -- Diseases and pests.
Notes: Cover title.

"May 1994."

Shipping list no.: 94-0661-M.

Includes bibliographical references (p. 21-23).

Also issued online.