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Filtering by: Subject Tansy ragwort -- Control -- Oregon Advisor Mcevoy, Peter B. Degree Name Master of Science (M.S.) Peer Reviewed No

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...

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Masters Thesis

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control the invasive weed tansy ragwort (Frick and Holloway 1964). After this initial introduction, the
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...

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Masters Thesis

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Entomology Research Farm, Corvallis, Oregon 13 5. Comparison of day and night sampling of the ragwort flea
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

Full Text:

, Tyriajacobaeae (L.) (Lepidoptera: Arctiidae), was released in 1959 to control the grassland weed tansy ragwort

ScholarsArchive@OSU

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

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

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

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