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Filtering by: Subject Fir -- Diseases and pests Committee Member Anderson, N. H. Decade 1970-1979

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:

consumption of Douglas-fir cone and seed tissue by B. colfaxiana on the Buckhead Seed Production Area, 1971
Sampling and estimating populations of insect seed-predators in coniferous forests

Creator:

Russell, Malcolm Howard

Resource Type:

Masters Thesis

Full Text:

populations of Barbara colfaxiana (Kft. ), the 4 Douglas fir cone moth, and of cones of Pseudotsuga