Elucidating crop losses and control of Rhizoctonia solani and Rhizoctonia cerealis in winter wheat
Brown, Matthew (2016) Elucidating crop losses and control of Rhizoctonia solani and Rhizoctonia cerealis in winter wheat. PhD thesis, University of Nottingham.
Rhizoctonia solani is a species complex comprising 13 anastomosis groups (AG) that cause disease in a broad range of crops. Various AGs of R. solani are pathogenic to winter wheat causing damping-off and root rots. Rhizoctonia cerealis, the fungal agent of sharp eyespot, is known to commonly occur on the stems of wheat as part of stem base disease complex (SBD) consisting also of eyespot and brown foot rot (BFR). Eyespot is caused by Oculimacula acuformis or O. yallundae and BFR is principally caused by Microdochium nivale or M. majus. The population dynamics of SBD pathogens are continually changing due to environmental and agronomic pressures. Therefore, information on the current population dynamics and factors that influence population changes can guide the implementation of effective control measures. Furthermore the presence and dynamics of Rhizoctonia spp. in English wheat crops has not been previously investigated and there is also limited knowledge on the yield losses associated with root and stem base rhizoctonia diseases in wheat.
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