Soil Nematode Communities as Influenced by Cover Crops, with a Focus on Brassicaceae

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dc.contributor.advisorWeil, Ray R.en_US
dc.contributor.authorGruver, Lisa Stockingen_US
dc.contributor.departmentPlant Science and Landscape Architecture (PSLA)en_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2007-06-22T05:40:15Z
dc.date.available2007-06-22T05:40:15Z
dc.date.issued2007-06-11
dc.description.abstractThe effect of brassicaceous cover crops (Brassica juncea/<em>Sinapis alba, B. napus, and Raphanus sativus) on plant-parasitic and free-living soil nematode communities, in grain agroecosystems, was evaluated in three experiments, at two sites in Maryland. Brassicaceous cover crops alone did not suppress plant-parasitic nematodes, however when combined with rye (Secale cereale) or clover (Trifolium incarnatum), juvenile (J2) Heterodera glycines populations were lower in June, soybean yields were higher, or free-living nematode abundance was higher. Indices of free-living nematode community structure suggested that winter-kill of N-rich radishes activated the bacterivore community in early spring resulting in high populations of bacterivore dauer larvae and high community structure by summer. In contrast, nematode communities in spring-terminated rapeseed and rye plots had high abundances of fungivore nematodes and a plant associate/fungal feeder, Coslenchus. Brassicaceous cover crops in Maryland grain rotations may be more useful for managing soil ecology than for biofumigation of plant-parasitic nematodes.en_US
dc.format.extent2397369 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/1903/7028
dc.language.isoen_US
dc.subject.pqcontrolledAgriculture, Agronomyen_US
dc.subject.pqcontrolledBiology, Ecologyen_US
dc.subject.pquncontrolledBrassicaen_US
dc.subject.pquncontrollednematode community analysisen_US
dc.subject.pquncontrolledcover cropsen_US
dc.subject.pquncontrolledTylenchidaeen_US
dc.subject.pquncontrolleddauer larvaeen_US
dc.subject.pquncontrolledsoybean cyst nematodeen_US
dc.titleSoil Nematode Communities as Influenced by Cover Crops, with a Focus on Brassicaceaeen_US
dc.typeThesisen_US

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