Browsing Theses and Dissertations (Botany and Plant Pathology) by Author "Hansen, Everett"

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Comparative epidemiology of Phytophthora diseases of Rhododendron

Taylor, Clare Rebecca (2011-07-06)

Rhododendron species are host to many Phytophthora species and are an important crop in the nursery industry. The foliar epidemiology of twelve Phytophthora diseases on Rhododendron was studied in field and growth chambe ...
The effects of Phytophthora ramorum stem inoculation on aspects of tanoak physiology and xylem function in saplings and seedlings

Stamm, Elizabeth A. (2012-03-16)

Phytophthora ramorum, an oomycete plant pathogen, is the causal agent of sudden oak death, a serious disease of Fagaceous trees in California and Oregon over the last decade. Tanoak (Notholithocarpus densiflorus) is one ...
Pathways of infection of Phytophthora ramorum in rhododendron

Lewis, Carrie D. (2005-09-09)

Phytophthora ramorum, a plant pathogen, is the cause of sudden oak death and ramorum blight and shoot die-back. It has a wide host range including many native forest species and common nursery plants. The lack of knowled ...
Viability and infective potential of Phytophthora pini zoospores in a recirculating irrigation system

Shay, Sarah D. (2012-08-31)

Phytophthora pini Leonian, recently re-established from P. citricola I, is a pathogen with a wide range of forest and nursery hosts. It causes foliar infections in horticultural nurseries in Oregon, where recirculating ...