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The effect of light and nitrogen limitation on western conifers : response to Armillaria ostoyae infection

Creator:: Entry, James A.
Abstract:: Armillaria (Fr. ex. Fr.) is a parasite whose pathogenicity and role in forest ecosystems often depends upon the physiological condition of the tree. Therefore, I tested the frequency and severity of Armillaria ostoyae (Romagn.) Herink infection among Abies grandis (Dougl.) Lindl., Larix occidentalis Nutt., Pinus contorta var. latifolia (Engelm.), Pinus...
Resource Type:: Dissertation

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

Creator:: Russell, Malcolm Howard
Resource Type:: Masters Thesis
Full Text:: probability sampling methods for estimating populations of conifer cones and seeds and their associated

Heritabilities and associations between some agronomic characters in a two-row x six-row barley cross

Creator:: Bray, Donald William
Resource Type:: Dissertation
Full Text:: , tillering, maturity, and resistance to diseases, insects, drought and lodging. Most of the important

The nature of Fusarium wilt disease resistance in tomato

Creator:: Stromberg, Erik Leslie
Abstract:: Bioassays of acetone extracts from xylem tissue in tomato stems and corresponding reductions in Fusarium oxysporum f.sp. lycopersici race 1 or 2 populations within the stems suggest that fungitoxic materials within the xylem vessels of Bonny Best, Jefferson, and Marglobe tomato cultivars initially kill a portion of the inoculum conidia....
Resource Type:: Dissertation
Full Text:: BOTANY AND PLANT PATHOLOGY presented on A de, 7 7 Title: THE NATURE OF FUSARIUM WILT DISEASE RESISTANCE

Yield loss assessment in nonprotected winter wheat varieties (Triticum aestivum, L. em Thell)

Creator:: Camacho Casas, Miguel Alfonso
Abstract:: The effects of some soil- and foliar-borne biotic factors on grain yield and the components of yield were evaluated using five winter wheat varieties sown at two dates. Within each planting date, varieties were grown under four different combinations of two soil treatments (fumigation and nonfumigation) and two foliar treatments...
Resource Type:: Masters Thesis
Full Text:: , disease resistance is the most economic means of protection. In the Pacific Northwest there are many soil

Genetic relationships between pea seedborne mosaic virus resistance and horticultural characteristics, powdery mildew, enation mosaic virus and red clover vein mosaic virus resistance in Pisum sativum L.

Creator:: Sewall, Cathy Hampshire
Resource Type:: Masters Thesis
Full Text:: LITERATURE CITED 72 LIST OF TABLES Table Page 1. Disease resistance and horticultural charac

Inheritance of resistance to head smut disease in maize (Zea mays L.)

Creator:: Akhtar, Ali
Resource Type:: Dissertation
Full Text:: x SM7, 1982 and 1983. 93 INHERITANCE OF RESISTANCE TO HEAD SMUT DISEASE IN MAIZE (ZEA MAYS L

Mistletoe on conifers

Creator:: Johnson, Emil
Resource Type:: Undergraduate Thesis
Full Text:: , insects, disease and wasteful methods of logging and lumber manufacturing were making in our timber

Growth and variability of Fomes pini in culture

Creator:: Park, Jai Young
Resource Type:: Masters Thesis
Full Text:: includes a brief historical dis- cussion of the disease and a 8tatetent of its economic importance. It is

The parasite complex of the pea aphid, Acyrthosiphon pisum (Harris) on alfalfa in western Oregon

Creator:: Dickie, Alfred Gordon
Abstract:: This study was initiated in the Spring of 1966 for the purpose of determining the present status and effectiveness of imported parasitic wasps of the pea aphid in the Willamette Valley of western Oregon. The pea aphid is a serious pest throughout the pea and alfalfa growing regions of the...
Resource Type:: Masters Thesis
Full Text:: pest throughout the pea and alfalfa growing sections of the United States and Canada. Plants attacked

ScholarsArchive@OSU

The effect of light and nitrogen limitation on western conifers : response to Armillaria ostoyae infection

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

Heritabilities and associations between some agronomic characters in a two-row x six-row barley cross

The nature of Fusarium wilt disease resistance in tomato

Yield loss assessment in nonprotected winter wheat varieties (Triticum aestivum, L. em Thell)

Genetic relationships between pea seedborne mosaic virus resistance and horticultural characteristics, powdery mildew, enation mosaic virus and red clover vein mosaic virus resistance in Pisum sativum L.

Inheritance of resistance to head smut disease in maize (Zea mays L.)

Mistletoe on conifers

Growth and variability of Fomes pini in culture

The parasite complex of the pea aphid, Acyrthosiphon pisum (Harris) on alfalfa in western Oregon

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