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Filtering by: Committee Member Phinney, H. K. Decade 1970-1979 Subject Douglas fir -- Diseases and pests

Population dynamics of the Douglas-fir cone moth, Barbara colfaciana (Kft.) (Lepidoptera:Olethreutidae)

Creator:

Nebeker, T. Evan

Abstract:

A population of the Douglas-fir cone moth, Barbara colfaxiana (Kft. ), was studied on the Buckhead Seed Production Area, Oakridge, Oregon, during 1971 and 1972. A method of estimating cone and insect populations is presented. Factors contributing to the mortality of B. colfaxiana are discussed, with resinosis being the critical...

Resource Type:

Dissertation

Full Text:

. P. Nagel (Major Professor), Dr. N. H. Anderson, Dr. J. Rudinsky, Dr. S. Overton and Dr. K. E. Rowe