Plant diversity and its effects on populations of cucumber beetles and their natural enemies in a cucurbit agroecosystem

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dc.contributor.authorWalker, Jasonen
dc.contributor.departmentHorticultureen
dc.date.accessioned2014-03-14T21:43:13Zen
dc.date.adate2008-08-22en
dc.date.available2014-03-14T21:43:13Zen
dc.date.issued1997en
dc.date.rdate2008-08-22en
dc.date.sdate2008-08-22en
dc.description.abstractPopulations of striped cucumber beetles (<i>Acalymma vittatum</i> Fabr.), spotted cucumber beetles (<i>Diabrotica undecimpunctata howardi</i> Barber), western cucumber beetles (<i>Acalymma trivittatum</i> Mann.), Pennsylvania leatherwings (<i>Chauliognathus pennsylvanicus</i> DeGeer), Diptera (Order: Diptera), lady beetles (Order: Coleoptera, Family: Coccinellidae), hymenoptera (Order: Hymenoptera), and spiders (Order: Araneae) in a cucumber field and a bordering field of uncultivated vegetation were assessed using yellow sticky traps to determine: 1) the relative abundances of target insects across the uncultivated vegetation and the crop field, 2) relationships between target insects and plant species. In both years populations striped and spotted cucumber beetles and Pennsylvania leatherwings (only in 1995) increased significantly and Diptera decreased significantly in the direction of the crop. The strength of these relationships increased over the season to a peak in August in 1995 and July in 1996 and then decreased in September in both years. There were significant correlations between Diptera and sweet-vernal grass in 1995. In 1996, cucumber beetles were correlated with wild violet (<i>Viola</i> spp.) and white clover (<i>Trifolium repens</i>); Diptera with wild violets; and the lady beetle <i>Coleomegilla maculata</i> with goldenrod (<i>Solidago</i> spp.), English plantain (<i>Plantago lanceolata</i>), and marjoram (<i>Origanum</i> spp.) in 1996. This study demonstrated the potential value of increasing the diversity of a cucumber field to control insect pests (and thus reduce pesticide useage) as well as suggested specific plants that influenced insect populations.en
dc.description.degreeMaster of Scienceen
dc.format.extentviii, 64 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-08222008-063552en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-08222008-063552/en
dc.identifier.urihttp://hdl.handle.net/10919/44346en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1997.W355.pdfen
dc.relation.isformatofOCLC# 36788919en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectcommunity ecologyen
dc.subjectcucumbersen
dc.subjectPennsylvania leatherwingen
dc.subjectDipteraen
dc.subjectlady beetlesen
dc.subjectwild violeten
dc.subjectcloveren
dc.subjectgoldenroden
dc.subject.lccLD5655.V855 1997.W355en
dc.titlePlant diversity and its effects on populations of cucumber beetles and their natural enemies in a cucurbit agroecosystemen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineHorticultureen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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