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INFLUENCE OF LAND-USE INTENSITY ON SOIL NEMATODE COMMUNITIES AND THEIR RELATIONSHIP TO RHIZOCTONIA SOLANI DISEASE SUPPRESSION

dc.contributor.authorArseneault, Hannah
dc.contributor.copyright-releaseNot Applicableen_US
dc.contributor.degreeMaster of Scienceen_US
dc.contributor.departmentFaculty of Agricultureen_US
dc.contributor.ethics-approvalNot Applicableen_US
dc.contributor.external-examinerN/Aen_US
dc.contributor.graduate-coordinatorGordon Priceen_US
dc.contributor.manuscriptsNot Applicableen_US
dc.contributor.thesis-readerAdam Fosteren_US
dc.contributor.thesis-readerTudor Borzaen_US
dc.contributor.thesis-supervisorDerek Lynchen_US
dc.contributor.thesis-supervisorTandra Fraseren_US
dc.date.accessioned2020-09-01T13:20:26Z
dc.date.available2020-09-01T13:20:26Z
dc.date.defence2020-08-24
dc.date.issued2020-09-01T13:20:26Z
dc.description.abstractABSTRACT Soil organic matter (SOM) degradation linked to intensive management across PEI may negatively impact soil nematode communities and disease suppression. Soil nematode communities (Chapter 2), Rhizoctonia solani soil concentrations (Chapter 3), and soil properties were assessed across three land-use intensities (pasture/forest systems<four year grain rotations<three year potato rotations) from PEI field soils in 2018 and 2019. Nematode faunal indices were then tested for their ability to predict soils suppressive to R. solani disease in soybeans (Chapter 3). Nematode indices reflected degraded nematode communities in high intensity potato rotations, while the community as a whole responded to low intensity vegetation gradients. R. solani field soil concentrations were negatively correlated with several indicators of SOM content, while POM C and ACE protein were positively correlated regardless of environmental conditions. Although nematode faunal indices were not good indicators of R. solani suppressive soils, the fungivore Aphelenchidae was positively associated with hypocotyl disease ratings.en_US
dc.identifier.urihttp://hdl.handle.net/10222/79789
dc.language.isoenen_US
dc.subjectSoilen_US
dc.subjectNematodeen_US
dc.subjectRhizoctonia solanien_US
dc.subjectLand-use intensityen_US
dc.titleINFLUENCE OF LAND-USE INTENSITY ON SOIL NEMATODE COMMUNITIES AND THEIR RELATIONSHIP TO RHIZOCTONIA SOLANI DISEASE SUPPRESSIONen_US
dc.typeThesisen_US

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