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dc.contributor.authorStephens, Marianne Shockley
dc.date.accessioned2014-03-03T20:06:42Z
dc.date.available2014-03-03T20:06:42Z
dc.date.issued2001-12
dc.identifier.otherstephens_marianne_s_200112_ms
dc.identifier.urihttp://purl.galileo.usg.edu/uga_etd/stephens_marianne_s_200112_ms
dc.identifier.urihttp://hdl.handle.net/10724/20450
dc.description.abstractThe effects of algae on the efficacy of Bacillus thuringiensis var. israelensis against larval black flies (Simulium vittatum IS-7) were investigated in laboratory bioassays. Microcystis, a blue-green algae, demonstrated no statistically significant effects on the efficacy of B.t.i. Navicula, a diatom, demonstrated significant effects at cell concentrations greater than 34,000 cells/ml. Scenedesmus, a green algae, also demonstrated significant effects at cell concentrations greater than 7,000 cells/ml. Negative effects of algae were reversed both by increasing the concentration of B.t.i. and to a lesser degree by increasing exposure period. Differences attributable to introduction time of algae and B.t.i. into the bioassay could not be determined from our experiments. Residual toxicity determinations using the Aedes aegypti bioassay revealed that, if given the opportunity, black flies ingest significantly more algae and B.t.i. particles in an increased exposure period.
dc.publisheruga
dc.rightspublic
dc.subjectAedes aegypti
dc.subjectAlgae
dc.subjectBacillus thuringiensis var. israelensis
dc.subjectBioassay
dc.subjectBlack flies
dc.subjectB.t.i.
dc.subjectDiptera
dc.subjectMicrocystis
dc.subjectNavicula
dc.subjectSimuliidae
dc.subjectSimulium vittatum IS-7
dc.subjectScenedesmus
dc.titleThe effects of algae on the efficacy of Bacillus thuringiensis var. Israelensis against larval black flies (diptera: simuliidae) in laboratory bioassays
dc.typeThesis
dc.description.degreeMS
dc.description.departmentEntomology
dc.description.majorEntomology
dc.description.advisorRay Noblet
dc.description.committeeRay Noblet
dc.description.committeeDarold Batzer
dc.description.committeeBeverly Sparks


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