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The Effects of Seed Source and Planting Environment on Douglas-fir (Pseudotsuga menziesii) Foliage Diseases

Creator:: Wilhelmi, Nicholas
Abstract:: Douglas-fir (Pseudotsuga menziesii) is a commercially and ecologically important tree species native to western North America. The foliar pathogens Phaeocryptopus gaeumannii, the causal agent of Swiss Needle Cast, and Rhabdocline species, the causal agents of Rhabdocline needle cast, are two important pathogens specific to Douglas-fir. These pathogens are highly influenced...
Resource Type:: Masters Thesis
Full Text:: Effects of Seed Source and Planting Environment on Douglas-fir (Pseudotsuga menziesii) Foliage Diseases

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

Phylogenetic Identification of Pathogenic and Endophytic Fungal Populations in West Coast Douglas-fir (Pseudotsuga menziesii) Foliage

Creator:: Daniels, Hazel A.
Abstract:: Douglas-fir provides social, economic, and ecological benefits in the Pacific Northwest (PNW). In addition to timber, forests support abundant plant and animal biodiversity and provide socioeconomic viability for many rural communities. Products derived from Douglas-fir account for approximately 17% of the U.S. lumber output with an estimated value of $1.9...
Resource Type:: Masters Thesis
Full Text:: Douglas-fir (Pseudotsuga menziesii) Foliage. Abstract approved

Physiological ageing of Russet Burbank seed potatoes: effects on seed tuber quality, plant development, and yield

Creator:: Thompson, Delila M.
Abstract:: During physiological ageing of seed potatoes, the stored tuber undergoes certain biochemical changes which cause the breaking of dormancy and the initiation of bud growth. The ageing process can be manipulated through storage temperature and duration. Higher temperatures usually accelerate seed tuber ageing. In order to define the process of...
Resource Type:: Masters Thesis
Full Text:: foliage of plants from aged seed grows faster early in the season and then the growth rate declines

Influence of ruminant digestive processes on germination of ingested seeds

Creator:: Lowry, Amaya A.
Abstract:: Managing cattle to disseminate seeds of desirable plants, or alternatively, to restrict weed seed contamination on rangelands is of interest to managers. Four experiments were conducted to determine effects of ruminant digestion on germination of ingested seeds. A number of plant species representing a variety of seed size and seed...
Resource Type:: Masters Thesis
Full Text:: of desirable plants, or alternatively, to restrict weed seed contamination on rangelands is of

Sampling and estimating populations of insect seed-predators in coniferous forests

Creator:: Russell, Malcolm Howard
Resource Type:: Masters Thesis
Full Text:: Sampling and estimating populations of insect seed

The life history and habits of a new species of seed midge, Dasyneura Sp., which attacks Ladino clover

Creator:: Bishop, Guy William
Resource Type:: Masters Thesis
Full Text:: Southern Oregon. Because of its similar appearance this insect was thought to be the clover- seed midge

Some of the problems of growing vegetable seed in Oregon and Washington

Creator:: Clark, R. Ralph
Resource Type:: Masters Thesis
Full Text:: States. Insect and disease control Is much the same es for cabbage. Most of the seed that has been

Factors affecting the germination of seeds of the dwarf mistletoe Arceuthobium campylopodum f. typicum. (Engelm.) Gill

Creator:: Sayre, Richard Martin
Resource Type:: Masters Thesis
Full Text:: . . . . . . . . . . . . . . 4 Seed Germination 8 The effect of light. . . . . . . . . 8 The effeot of humidity

Insect pests of economic importance on cereal crops in the Senegal River Basin, West Africa

Creator:: Sy, Adama
Abstract:: Cereal crops cultivated in Mali, Mauritania and Senegal consist primarily of sorghum, millet, rice and maize. They form the gramineous crops that, are programmed for the agricultural improvement of the Senegal River Basin. Twelve economically important insect pests on these crops were selected for study and treated with regard to...
Resource Type:: Masters Thesis
Full Text:: Master of Science in Entomology presented on June 10, 1977 Title: INSECT PESTS OF ECONOMIC IMPORTANCE

ScholarsArchive@OSU

The Effects of Seed Source and Planting Environment on Douglas-fir (Pseudotsuga menziesii) Foliage Diseases

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

Phylogenetic Identification of Pathogenic and Endophytic Fungal Populations in West Coast Douglas-fir (Pseudotsuga menziesii) Foliage

Physiological ageing of Russet Burbank seed potatoes: effects on seed tuber quality, plant development, and yield

Influence of ruminant digestive processes on germination of ingested seeds

Sampling and estimating populations of insect seed-predators in coniferous forests

The life history and habits of a new species of seed midge, Dasyneura Sp., which attacks Ladino clover

Some of the problems of growing vegetable seed in Oregon and Washington

Factors affecting the germination of seeds of the dwarf mistletoe Arceuthobium campylopodum f. typicum. (Engelm.) Gill

Insect pests of economic importance on cereal crops in the Senegal River Basin, West Africa

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