Index Catalog // ScholarsArchive@OSU

Bionomics of the clover cyst nematode, Heterodera trifolii (Goffart, 1932) Oostenbrink, 1939 (Nematoda: Heteroderidae)

Creator:: Sen, Arun Kumar
Resource Type:: Masters Thesis
Full Text:: the first plant parasitic nematode and described the first plant disease caused by a nematode

Relation of nitrogenous substances in rose leaves to powdery mildew resistance

Creator:: Bartlett, Allan B.
Abstract:: There is considerable variation among rose varieties in susceptibility to mildew, and as a result of maturation, leaves of most susceptible varieties become resistant to infection. The nature of resistance has been sought in various studies involving environmental, morphological, and physiological factors. An attempt was made in the present investigation...
Resource Type:: Dissertation
Full Text:: between age of tissue and resistance or susceptibility to disease. The older tissue is usually more

Isolation and identification of dahlia viruses

Creator:: Lawson, Roger Harold
Abstract:: Three viruses were isolated from dahlias using a modification of Yarwood's leaf-disc method of inoculation. Two of these isolates have been reported previously in dahlias. In addition, a fourth virus was isolated using a liquid-nitrogen transmission technique. Dahlia virus isolate 1 possessed host range and thermal inactivation properties similar to...
Resource Type:: Dissertation
Full Text:: disease. Brierley (7, P. 240) found the mosaic disease widespread in Connecticut, New Jersey, and New

Latent viruses in apple varieties in Oregon nurseries

Creator:: Dimalla, Gerard George
Resource Type:: Masters Thesis
Full Text:: R1Z740-7A was useful in determining the presence of SPy and a new 5 virus disease termed Chiorotic

The use of flowering crab apples for the detection of latent viruses in apples

Creator:: Reynolds, James Edward
Abstract:: Recent investigations indicate that several latent viruses of apples exist in common commercial apple stocks, but these viruses and their relationships are incompletely understood. This thesis describes investigations of crab apples as indicators of latent viruses of apples. Eighty-eight varieties and species of crab apples were tested as indicators of...
Resource Type:: Dissertation
Full Text:: rrlore rapidly and carne into bearing at a younger age than did those infected with the disease. Mink

Active survival of Verticillium dahliae in soil

Creator:: Martinson, Charlie Anton
Resource Type:: Dissertation
Full Text:: rootstocks (stolons and runners) and usually remain in production until soil fertility, disease, or insect

The role of Verticillium albo-atrum Reinke and Berth in seed transmission and induction of a latent disease of Pelargonium

Creator:: Koocheki, Hormozdyar Khodadad
Abstract:: Many initially healthy Pelargonium seedlings developed symptoms of Verticillium wilt in an Oregon State University greenhouse when they attained blooming age. The symptoms first appeared in May as "edge burning," yellowing, and wilting of leaves. In late summer, these seedlings which were the offspring of Verticillium infected plants, became severely...
Resource Type:: Masters Thesis
Full Text:: seed transmission and induction of a latent disease of Pelargonium AN ABSTRACT OF THE THESIS OF

Physical factors affecting longevity and germination of seed of Western dwarfmistletoe (Arceuthobium campylopodum Engelm. f. campylopodum)

Creator:: Beckman, Kent Mardsen
Abstract:: Longevity and germination of seed of western dwarfmistletoe (Arceuthobium campylopodum Engelm. f. campylopodum) of ponderosa pine (Pinus ponderosa Laws.) was investigated to determine: 1) the influence of humidity and temperature on seed viability and deterioration during storage; 2) the physiology of seed dormancy; 3) the composition of seed reserve food...
Resource Type:: Dissertation
Full Text:: reported to decrease host resistance to disease and insect attack (10, p. 3lZ; 25; Z7; a8;631. It is often

Anatomical studies of Pinus ponderosa Laws : infested by Elytroderma deformans (Weir) Darker

Creator:: Wirtz, Felicia Pietrykowski
Abstract:: Pine needle blight of Pinus ponderosa Laws. caused by Elytroderma deformans (Weir) Darker is recognized by changes in the needles, in the bark and in the development of the branches. Anatomical studies of the host-parasite relation have been made previously on young pine tissue up to four years of age...
Resource Type:: Dissertation
Full Text:: disease caused by this fungus is commonly known as pine needle blight. Seven species of two- and three

Relation of boron to cherry rosette disease in Oregon, and the possible implication in Oregon, and the possible implication of a virus

Creator:: Bolwyn, Bart
Abstract:: A disease of sweet cherry (Prunus avium L.) known as "cherry rosette" has threatened production of cherries in Oregon. In 1961 this disease was observed in widely separated orchards. Rosette occurred in isolated trees or in spreading patterns, often from identified single trees or from one section of an orchard....
Resource Type:: Dissertation
Full Text:: Relation of boron to cherry rosette disease in Oregon, and

ScholarsArchive@OSU

Bionomics of the clover cyst nematode, Heterodera trifolii (Goffart, 1932) Oostenbrink, 1939 (Nematoda: Heteroderidae)

Relation of nitrogenous substances in rose leaves to powdery mildew resistance

Isolation and identification of dahlia viruses

Latent viruses in apple varieties in Oregon nurseries

The use of flowering crab apples for the detection of latent viruses in apples

Active survival of Verticillium dahliae in soil

The role of Verticillium albo-atrum Reinke and Berth in seed transmission and induction of a latent disease of Pelargonium

Physical factors affecting longevity and germination of seed of Western dwarfmistletoe (Arceuthobium campylopodum Engelm. f. campylopodum)

Anatomical studies of Pinus ponderosa Laws : infested by Elytroderma deformans (Weir) Darker

Relation of boron to cherry rosette disease in Oregon, and the possible implication in Oregon, and the possible implication of a virus

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