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Filtering by: Subject Douglas fir -- Fertilizers Committee Member Waring, Richard Degree Field Entomology

Impact of insects on seed production in a Douglas-fir seed orchard in Oregon

Creator:

Dombrosky, Scott A.

Abstract:

The impact of various factors on seed production in a Douglas-fir (Pseudotsuga menziesii) seed orchard in western Oregon was examined by monitoring the fate of seeds in thirty cones, stratified into three crown levels, on each of ten trees during the 1984 growing season. Cones were examined monthly between April...

Resource Type:

Masters Thesis

Full Text:

Impact of insects on seed production in a Douglas-fir seed