Showing 1 - 20 results of 23 for search 'Mason, Richard R.', query time: 0.07s Refine Results
  1. 1
    Case history of population change in a Bacillus thuringiensis-treated vs. an untreated outbreak of the western spruce budworm

    Case history of population change in a Bacillus thuringiensis-treated vs. an untreated outbreak of the western spruce budworm by Mason, Richard R.

    [Portland, Or.] (333 S.W. First Ave., P.O. Box 3890, Portland 97208-3890) : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1996
    Format: Government Document Book


    Save to List
    Saved in:
  2. 2
    Forecasting outbreaks of the Douglas-fir tussock moth from lower crown cocoon samples

    Forecasting outbreaks of the Douglas-fir tussock moth from lower crown cocoon samples by Mason, Richard R.

    Portland, Or. (333 S.W. First Ave., Portland 97208-3890) : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1993
    Format: Government Document Book


    Save to List
    Saved in:
  3. 3
    Sampling western spruce budworm larvae by counting larvae on lower crown branches

    Sampling western spruce budworm larvae by counting larvae on lower crown branches by Mason, Richard R.

    [Portland, Or.] : [U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station], 1989
    Format: Government Document Book


    Save to List
    Saved in:
  4. 4
    Detecting suboutbreak populations of the Douglas-fir tussock moth by sequential sampling of early larvae in the lower tree crown

    Detecting suboutbreak populations of the Douglas-fir tussock moth by sequential sampling of early larvae in the lower tree crown by Mason, Richard R.

    Portland, Or. : Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1978
    Format: Government Document Book


    Save to List
    Saved in:
  5. 5
    Douglas-fir tussock moth handbook : how to sample Douglas-fir tussock moth larvae

    Douglas-fir tussock moth handbook : how to sample Douglas-fir tussock moth larvae by Mason, Richard R.

    [Washington] : Dept. of Agriculture : for sale by the Supt. of Docs., U.S. Govt. Print. Off, 1979
    Format: Government Document Book


    Save to List
    Saved in:
  6. 6
    Forest-site relationships within an outbreak of lodgepole needle miner in central Oregon

    Forest-site relationships within an outbreak of lodgepole needle miner in central Oregon by Mason, Richard R.

    Portland, Or. : Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, Forest Service, 1972
    Format: Government Document Book


    Save to List
    Saved in:
  7. 7
    Controlled field test of stabilized pyrethrins against the western hemlock looper

    Controlled field test of stabilized pyrethrins against the western hemlock looper by Mason, Richard R.

    [Portland, Or.] : [Forest Service of the U.S. Department of Agriculture], 1970
    Format: Book


    Save to List
    Saved in:
  8. 8
    Collapse of an outbreak population of the douglas-fir tussock moth, Hemerocampa Pseudotsugata (Lepidoptera: Lymantriidae)

    Collapse of an outbreak population of the douglas-fir tussock moth, Hemerocampa Pseudotsugata (Lepidoptera: Lymantriidae) by Mason, Richard R.

    Portland, Or. : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1971
    Format: Government Document Book


    Save to List
    Saved in:
  9. 9
    Sampling low density populations of the Douglas-fir tussock moth by frequency of occurrence in the lower tree crown

    Sampling low density populations of the Douglas-fir tussock moth by frequency of occurrence in the lower tree crown by Mason, Richard R.

    Portland, Or. : Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1977
    Format: Government Document Book


    Save to List
    Saved in:
  10. 10
    Monitoring larval populations of the Douglas-fir tussock moth and the western spruce budworm on permanent plots : sampling methods and statistical properties of data

    Monitoring larval populations of the Douglas-fir tussock moth and the western spruce budworm on permanent plots : sampling methods and statistical properties of data by Mason, Richard R.

    Portland, Or. (333 S.W. First Ave., P.O. Box 3890, Portland 97208-3890) : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1994
    Format: Government Document Book


    Save to List
    Saved in:
  11. 11
    Case history of population change in a Bacillus thuringiensis-treated vs. an untreated outbreak of the western spruce budworm

    Case history of population change in a Bacillus thuringiensis-treated vs. an untreated outbreak of the western spruce budworm by Mason, Richard R.

    Portland, Or. : United States, Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1996
    Format: Government Document Book


    Save to List
    Saved in:
  12. 12
    Sequential sampling of Douglas-fir tussock moth populations

    Sequential sampling of Douglas-fir tussock moth populations by Mason, Richard R.

    [Portland, Or.] : Pacific Northwest Forest and Range Experiment Station, U.S.D.A. Forest Service, 1969
    Format: Government Document Book


    Save to List
    Saved in:
  13. 13
    A pilot experiment of forest fertilization during an outbreak of the western spruce budworm in northeastern Oregon

    A pilot experiment of forest fertilization during an outbreak of the western spruce budworm in northeastern Oregon by Mason, Richard R.

    [Portland, Or.] (333 S.W. First Ave., P.O. Box 3890, Portland 97208-3890) : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1998
    Other Authors: “…Mason, Richard R.…”
    Format: Government Document Book


    Save to List
    Saved in:
  14. 14
    How to predict population trends

    How to predict population trends by Mason, Richard R.

    [Washington, D.C.?] : U.S. Dept. of Agriculture, Combined Forest Pest Research and Development Program, 1983
    Format: Government Document Book


    Save to List
    Saved in:
  15. 15
    Sampling Western Spruce Budworm larvae by frequency of occurrence on lower crown branches

    Sampling Western Spruce Budworm larvae by frequency of occurrence on lower crown branches by Mason, Richard R.

    [Portland, Or. (319 S.W. Pine St., P.O. Box 3890, Portland 97208)] : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1990
    Format: Government Document Book


    Save to List
    Saved in:
  16. 16
    Recurrent outbreak of the Douglas-fir tussock moth in the Malheur National Forest : a case history

    Recurrent outbreak of the Douglas-fir tussock moth in the Malheur National Forest : a case history

    Portland, Or. : U.S. Dept. of Agriculture, Pacific Northwest Research Station, 1998
    Other Authors: “…Mason, Richard R.…”
    Format: Government Document Book


    Save to List
    Saved in:
  17. 17
    Douglas-fir tussock moth handbook : predation and parasitization of Douglas-fir tussock moth egg masses

    Douglas-fir tussock moth handbook : predation and parasitization of Douglas-fir tussock moth egg masses by Torgersen, Torolf R.

    [Washington] : Dept. of Agriculture : for sale by the Supt. of Docs., U.S. Govt. Print. Off, 1979
    Other Authors: “…Mason, Richard R.…”
    Format: Government Document Book


    Save to List
    Saved in:
  18. 18
    A portable vacuum for collecting arthropods from drop cloths

    A portable vacuum for collecting arthropods from drop cloths by Paul, H. Gene

    [Portland, Or.] : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1985
    Other Authors: “…Mason, Richard R.…”
    Format: Government Document Book


    Save to List
    Saved in:
  19. 19
    A pilot experiment of forest fertilization during an outbreak of the western spruce budworm in northeastern Oregon

    A pilot experiment of forest fertilization during an outbreak of the western spruce budworm in northeastern Oregon

    [Portland, Or.] (333 S.W. First Ave., P.O. Box 3890, Portland 97208-3890) : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 1998
    Other Authors: “…Mason, Richard R.…”
    Format: Government Document Book


    Save to List
    Saved in:
  20. 20
    Major outbreaks of the Douglas-fir tussock moth in Oregon and California

    Major outbreaks of the Douglas-fir tussock moth in Oregon and California by Wickman, Boyd E.

    Portland Or. : Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1973
    Other Authors: “…Mason, Richard R.…”
    Format: Government Document Book


    Save to List
    Saved in:

Search Tools: