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Seasonal Abundance of the Asparagus Aphid in Washington

Creator:: Wright, Larry C. and Cone, Wyatt W.
Resource Type:: Conference Proceeding
Full Text:: ABUNDANCE OF THEkASPARAGUS APHID IN WASHINGTON Tl. C. Wright j^nd W. W. Cone Irrigated Ajriculture-Research

Seed depth influence on position of the growing point and chemical control of wild proso Millet (Panicum miliaceum L.)

Creator:: Fernandez Mendez, Raquel J.
Abstract:: Wild proso millet (Panicum miliaceum L.) is a serious weed recently infesting sweet corn fields in the Willamette Valley of western Oregon. Field and greenhouse experiments were conducted to determine the importance of seed depth in the position of the growing point of wild proso millet seedlings and in the...
Resource Type:: Masters Thesis
Full Text:: chemical control of wild proso Millet (Panicum miliaceum L.) AN ABSTRACT OF THE THESIS OF Raquel J

Adequacy of hand-defoliation of tansy ragwort (Senecio jacobaea L.) as a simulation of defoliation by cinnabar moth (Tyria jacobaeae (L.))

Creator:: Henneberger, Diane
Abstract:: Hand-defoliation was evaluated for its ability to simulate herbivory by cinnabar moth larvae, Tyria jacobaeae (L.) (Arctiidae) on the weed tansy ragwort, Senecio jacobaea L. (Asteraceae). The evaluation was done on a field population of flowering ragwort, for three different timings (early, middle, and late season) of damage. In the...
Resource Type:: Masters Thesis
Full Text:: ). The study reported here arose as part of an investigation of biological control of ragwort by the

Trichoderma spp. : distribution in stumps infested with Phellinus weirii and growth and antagonism in vitro

Creator:: Goldfarb, Barry
Abstract:: To determine which isolates will most rapidly replace Phellinus weirii in stumps and roots, Trichoderma spp. were isolated from P. weirii-infested stumps and roots, identified, and examined for growth rates and lethal effects on P. weirii in vitro. Phellinus weirii-infested Douglas-fir stumps and stump roots were sampled for microorganisms by...
Resource Type:: Masters Thesis
Full Text:: invaders of P. weirii-infested stumps and stump roots, and to identify some biological and environmental

Classical biological control of the filbert aphid, Myzocallis coryli (Goetze) (Homoptera:Aphididae) in western Oregon

Creator:: Messing, Russell H.
Abstract:: A classical biological control project was undertaken against the filbert aphid, Myzocallis coryli (Goetze), in western Oregon. Hazelnut orchards in Spain, France, and Italy were searched for natural enemies of the aphid, and a parasitic wasp, Trioxys pallidus Haliday, was imported, quarantined, mass-reared, and released in Oregon orchards. The wasp...
Resource Type:: Dissertation
Full Text:: Classical biological control of the filbert aphid

Biological control agents and where to find them

Creator:: Oregon State University. Extension Service, Dreves, Amy J., and Fisher, Glenn C.
Abstract:: Published September 1989. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report
Full Text:: CONTROL AGENTS AND WHERE TO FIND THEM ORgGON STATG UNIVERSITY EXTENSION SERVICE Biological

Biochemical studies on the mosquitocidal delta endotoxin of Bacillus thuringiensis subsp. israelensis

Creator:: Pollock, Martin L.
Abstract:: The cytolytic properties of the mosquitocidal 25 Kd protein deltaendotoxin of Bacillus thuringiensis subsp. israelensis (Bti) was studied using the human erythrocyte as a target cell. Both a fixedtime and a kinetic hemolytic bioassay were developed in order to screen a variety of treatments for their influence on the toxinerythrocyte...
Resource Type:: Masters Thesis
Full Text:: 7 control (Figures 8 to 12). There was a definite reduction in biological activity at pH 5 and pH

Environmental controls on the capacity of tansy ragwort (Senecio jacobaea L.) to compensate for defoliation by cinnabar moth (Tyria jacobaeae L.)

Creator:: Cox, Caroline Shipley
Abstract:: To assess the effect of summer moisture stress on the capacity of tansy ragwort (Senecio jacobaea L.) to compensate for defoliation by the cinnabar moth (Tyria jacobaeae LT7), the performance of plants grown under different irrigation regimes was measured. The proportion of plants producing new leaves following defoliation, the number...
Resource Type:: Masters Thesis

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:: encountered with registration of fungicidal compounds has resulted in an interest in biological control

The relative impact of single vs. multiple agents on the biological control of Tansy ragwort (Senecio jacobaea)

Creator:: James, Rosalind R.
Abstract:: Field experiments were done to test the relative effectiveness of single and multiple biological control agents in reducing weed populations using two insects, the cinnabar moth, Tvria iacobaeae (L.), and the ragwort flea beetle, Lonqitarsus iacobaeae (Waterhouse). These two insects were released for biological control of the biennial weed tansy...
Resource Type:: Masters Thesis
Full Text:: biological control of Tansy ragwort (Senecio jacobaea) AN ABSTRACT OF THE THESIS OF Rosalind R. James for

ScholarsArchive@OSU

Seasonal Abundance of the Asparagus Aphid in Washington

Seed depth influence on position of the growing point and chemical control of wild proso Millet (Panicum miliaceum L.)

Adequacy of hand-defoliation of tansy ragwort (Senecio jacobaea L.) as a simulation of defoliation by cinnabar moth (Tyria jacobaeae (L.))

Trichoderma spp. : distribution in stumps infested with Phellinus weirii and growth and antagonism in vitro

Classical biological control of the filbert aphid, Myzocallis coryli (Goetze) (Homoptera:Aphididae) in western Oregon

Biological control agents and where to find them

Biochemical studies on the mosquitocidal delta endotoxin of Bacillus thuringiensis subsp. israelensis

Environmental controls on the capacity of tansy ragwort (Senecio jacobaea L.) to compensate for defoliation by cinnabar moth (Tyria jacobaeae L.)

Potential of Trichoderma sp. for inhibition of Botrytis cinerea and Sclerotinia sclerotiorum on snap beans

The relative impact of single vs. multiple agents on the biological control of Tansy ragwort (Senecio jacobaea)

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