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Filtering by: Contributor advisor sim McEvoy, Peter B. Remove constraint Contributor advisor sim: McEvoy, Peter B.

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Escape in Time: Phenology Mitigates Impacts of the Introduced Cinnabar Moth, Tyria jacobaeae, on Native Herb Senecio triangularis in Western Oregon

Creator:

Lunde, A. Katarina

Abstract:

Classic biological control can be a powerful option for those tasked with managing biological invasions; however, some biocontrol releases lead to non-target attack – feeding, damage or development on species other than the target species. The cinnabar moth, Tyria jacobaeae L. (Lepidoptera: Erebidae) was introduced to Western Oregon as a...

Resource Type:

Masters Thesis
Non-target Effects of Biological Control: Ecological Risk of Tyria jacobaeae (Lepidoptera: Erebidae) to Senecio triangularis (Asteraceae) in Western Oregon

Creator:

Rodman, Madison G.

Abstract:

Non-target effects are one of the greatest potential risks of weed biological control programs, and understanding non-target effects of biological control at the population level is crucial for predicting when they will occur and altering the perception of biological control as a whole. In this thesis, we assessed the ecological...

Resource Type:

Masters Thesis
Plant architectural barriers to feeding site selection by the meadow spittlebug, Philaenus spumarius (L.)

Creator:

Hoffman, George D.

Abstract:

While current theories describing the insect-plant interaction have emphasized the biochemical aspects of the relationship, morphological components can also play a significant role in determining which plants or tissues are susceptible to insect attack. Xylem sap on which spittlebugs feed may lack many of the plant compounds responsible for host...

Resource Type:

Masters Thesis
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
Feeding, colonization and impact of the cinnabar moth, Tyria jacobaeae, on Senecio triangularis, a novel, native host plant

Creator:

Diehl, Jonathan W.

Abstract:

I conducted field and laboratory studies to determine the impact of the cinnabar moth, Tvria jacobaeae L., on the native perennial herb, Senecio triangularis Hook. The cinnabar moth was introduced into Oregon in 1960 to control the noxious weed Senecio jacobaea L. and is now well established on both the...

Resource Type:

Masters Thesis
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
Plant colonization of gopher mounds in adjacent pasture and prairie communities

Creator:

Macdonald, Catherine A.

Abstract:

I used field experiments to study how plants in two grassland communities colonized soil mounds made by the Camas pocket gopher, Thomomys bulbivorus (Richardson). I identified potential mound colonizers in each source of colonization (buried propagule bank, seed rain, and established vegetation) and then measured species specific rates of colonization...

Resource Type:

Masters Thesis
The effects of intraspecific plant competition and insect herbivory of ragwort (Senecio jacobaea) populations

Creator:

Fitzpatrick, Greg S.

Abstract:

I conducted field studies to determine the effect of insect herbivory and intraspecific plant competition on ragwort Senecio jacobaea. The objectives were to determine the patterns and causes in the distribution of the ragwort flea beetle Longitarsus jacobaeae foraging among varying densities of ragwort, to measure the behavioral and numerical...

Resource Type:

Masters Thesis
Biological control of purple loosestrife Lythrum salicaria by two chrysomelid beetles Galerucella pusilla and G. calmariensis

Creator:

Schooler, Shon

Abstract:

In the first part of this study we monitored the development of biological control of purple loosestrife Lythrum salicaria over a six-year period at Morgan Lake in western Oregon. In 1992, two beetles, Galerucella pusilla and G. calmariensis (Coleoptera: Chrysomelidae), were released to control the wetland weed at this test...

Resource Type:

Masters Thesis
Assessing the safety of weed biological control : a case study of the cinnabar moth Tyria jacobaeae

Creator:

Fuller, Jason L.

Abstract:

The cinnabar moth, Tyria jacobaeae (L.) (Lepidoptera:Arctiidae), was released in 1959 to control the grassland weed tansy ragwort, Senecio jacobaea L. (Asteraceae), despite evidence that caterpillars of this species can feed on native plants within the genera Senecio and Packera. Previous studies confirmed the moth's ability to develop on the...

Resource Type:

Masters Thesis

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Academic Affiliation

Entomology11
Botany and Plant Pathology3

Advisor

Mcevoy, Peter B.15
Mundt, Christopher C.1

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1982 to 2020

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Committee Member

Mundt, Chris2
Anderson, Norman1
Anderson, Norman H.1
Berry1
Borer, Elizabeth T.1
more Committee Members »

Creator

Schooler, Shon2
Campanella, Donald M.1
Cox, Caroline Shipley1
Diehl, Jonathan W.1
Fitzpatrick, Greg S.1
more Creators »

Date

Date range begin – Date range end

Current results range from 1981 to 2019

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Decade

2010-20192
2000-20094
1990-19992
1980-19897

Degree Field

Entomology12
Botany and Plant Pathology3

Degree Level

Master's12
Doctoral3

Degree Name

Master of Science (M.S.)12
Doctor of Philosophy (Ph.D.)3

Language

English [eng]15

License

All rights reserved6

Non-Academic Affiliation

Oregon State University. Graduate School14

Peer Reviewed

No13

Resource Type

Masters Thesis12
Dissertation3

Rights Statement

Copyright Not Evaluated9
In Copyright6

Subject

Invasive plants -- Ecology -- Oregon2
Purple loosestrife -- Biological control -- Oregon2
Senecio -- Biological control2
Tansy ragwort -- Biological control2
Apomixis1
more Subjects »

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