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Filtering by: Subject Beans -- Disease and pest resistance Advisor Powelson, Mary L. Decade 1980-1989

Role of inoculum sources of Botrytis cinerea in the epidemiology of gray mold of snap beans

Creator:

Johnson, Kenneth Bjorn

Abstract:

Spore dispersal gradients and pod disease gradients from point inoculum sources of Botrytis cinerea were measured over time in two snap bean field experiments. Laboratory grown inoculum was placed at ground level in a 30 x 30 cm square at bloom initiation and removed at full bloom. Dispersal of inoculum,...

Resource Type:

Masters Thesis

Full Text:

for Privacy_ U Mary L. Powelson Spore dispersal gradients and pod disease gradients from point
Potential of Trichoderma sp. for inhibition of Botrytis cinerea and Sclerotinia sclerotiorum on snap beans

Creator:

Nelson, Mark E.

Abstract:

Isolates of Trichoderma spp. collected from snap bean foliage were tested for inhibition of grey mold of snap beans caused by Botrytis cinerea. In a detached blossom-pod assay an isolate of Trichoderma hamatum reduced pod rot by 94% compared to the nontreated check. Control was comparable to that obtained with...

Resource Type:

Masters Thesis

Full Text:

senescence. As tissue, senesces plant resistance can be overcome, and fungi may penetrate and colonize
Irrigation water and plant density effects on the epidemiology of aerial stem rot of potatoes

Creator:

Cappaert, Marlys R.

Abstract:

Field plots of cv. Russet Burbank potatoes from a single seedlot were established at four sites over two seasons (1985-86) in two locations in Oregon to determine the role of water-borne inoculum of Erwinia carotovora in plant infection. One site at each location was irrigated from a surface-water source and...

Resource Type:

Masters Thesis

Full Text:

by onset of disease symptoms, final proportion of disease and area under the disease progress curve