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Filtering by: Subject Weeds -- Biological control Remove constraint Subject: Weeds -- Biological control

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A model study of a plant-herbivore system

Creator:

Stimac, Jerry Lynn

Abstract:

The dynamics of tansy ragwort, Senecio jacobaea L. , and the cinnabar moth, Tyria jacobaeae (L.) were studied with the aid of a system simulation model. The model development and validation were based on knowledge of the plant and herbivore gathered from the literature, four years of data from previous...

Resource Type:

Dissertation
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
Life-history, growth and interference of cheatgrass (Bromus tectorum L.) and yellow starthistle (Centaurea solstitialis L.)

Creator:

Sheley, Roger Leslie

Abstract:

Cheatgrass (Bromus tectorum L.) and yellow starthistle (Centaurea soistitialis L.) have invaded over 3 million ha of grasslands in the western U.S. Future management will require an understanding of the conditions, mechanisms, and processes which control species dominance, community dynamics, and desirable plant establishment in these alien dominated annual rangelands....

Resource Type:

Dissertation
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

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Academic Affiliation

Entomology2
Crop Science1
Rangeland Resources1

Advisor

Anderson, Norman H.1
Larson, Larry L.1
Mcevoy, Peter B.1
Overton, W. Scott1
Shenk, Myron1

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1978 to 1994

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Committee Member

Johnston, LaRea1
Kiemnec, Gary L.1
Krueger, Willaim1
Miller, Richard1
Stebbins, Robert1

Creator

Cox, Caroline Shipley1
Fernandez Mendez, Raquel J.1
Sheley, Roger Leslie1
Stimac, Jerry Lynn1

Date

Date range begin – Date range end

Current results range from 1977 to 1993

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Decade

1990-19991
1980-19892
1970-19791

Degree Field

Entomology2
Crop Science1
Rangeland Resources1

Degree Level

Doctoral2
Master's2

Degree Name

Doctor of Philosophy (Ph.D.)2
Master of Science (M.S.)2

Language

English [eng]4

Non-Academic Affiliation

Oregon State University. Graduate School4

Peer Reviewed

No3

Resource Type

Dissertation2
Masters Thesis2

Rights Statement

Copyright Not Evaluated4

Subject

Weeds -- Biological control[remove]4
Bromegrasses1
Centaurea1
Cinnabar moth1
Grasses -- Biological control1

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