Thesis
Carbon source dependent efficacy of anaerobic soil disinfestation in controlling apple replant disease
Washington State University
Master of Science (MS), Washington State University
2013
Handle:
https://hdl.handle.net/2376/103668
Abstract
GR and ET ASD treatments reduced persistence of R. solani AG-5 in artificially infested soil and all treatments except composted steer manure (CM) were effective in reducing root infection by this pathogen. ASD C source input affected seedling growth in soil artificially infested with R. solani AG-5, with GR and SM yielding significantly greater apple seedling biomass. Total fungal community analysis indicated that the GR treatment resulted in recruitment of a fungal community during the anaerobic phase of the ASD process that was disparate from that detected in the control and CM treatments. Among the GR amendment rates examined for ASD control of P. penetrans and R. solani AG-5, the 20 t ha-1 rate resulted in superior seedling growth and lesion nematode suppression relative to the no amendment control although pathogen suppression was rate independent. These studies demonstrate a potential for using grass residues as a C input for the conduct of anaerobic soil disinfestation to control ARD pathogens and parasites.
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Details
- Title
- Carbon source dependent efficacy of anaerobic soil disinfestation in controlling apple replant disease
- Creators
- Shashika Hewavitharana
- Contributors
- Mark Mazzola (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Plant Pathology, Department of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525080301842
- Language
- English
- Resource Type
- Thesis