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Browsing by Author "Todd, A.D."
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Ascospores as primary inoculum for epidemics of white leaf spot (Mycosphaerella capsellae) in winter oilseed rape in the UK
Inman, A.J.; Fitt, Bruce D.L.; Todd, A.D.; Evans, R.L. (1999-06)In the UK, conidia of Pseudocercosporella capsellae, the anamorph of Mycosphaerella capsellae, were observed on white leaf spot lesions on leaves throughout the growing season. Ascomata were not observed on lesions on ... -
Comparative epidemiology of Pyrenopeziza brassicae (light leaf spot) ascospores and conidia from Polish and UK populations
Karolewski, Z.; Evans, N.; Fitt, Bruce D.L.; Baierl, A.; Todd, A.D.; Foster, S.J. (2004-02)Despite differences in climate and in timing of light leaf spot epidemics between Poland and the UK, experiments provided no evidence that there are epidemiological differences between populations of Pyrenopeziza brassicae ... -
Components of resistance to diseases in winter oilseed rape cultivars: CORDISOR
West, Jon S.; Fitt, Bruce D.L.; Rogers, S. L.; White, R.P.; Todd, A.D.; Latunde-Dada, A.O.; Gladders, P.; Thomas, J.; Booth, E.; Jennaway, R.; Clarke, M.; Padbury, P.; Bowman, J.; Nightingale, M.; Werner, C. Peter; Jellis, G. J. (HGCA, 2008-12) -
Development of phoma lesions on oilseed rape leaves inoculated with ascospores of A-group or B-group Leptosphaeria maculans (stem canker) at different temperatures and wetness durations
Toscano-Underwood, C.; West, Jon S.; Fitt, Bruce D.L.; Todd, A.D.; Jedryczka, M. (2001-02)In controlled-environment experiments, ascospores of both A-group and B-group Leptosphaeria maculans were able to infect leaves of oilseed rape and produce phoma leaf spot lesions at temperatures from 5 to 20 degreesC and ... -
Spore dispersal and plant disease gradients : a comparison between two empirical models
Fitt, Bruce D.L.; Gregory , P. H.; Todd, A.D.; McCartney, H. A.; Macdonald, O.C. (1987-03)Power law and exponential models were fitted to 325 sets of observations which described decreases with distance in deposition of air-borne or splash-borne spores, or pollen, or in amounts of plant disease caused by fungi, ... -
Sporulation of Pyrenopeziza brassicae (light leaf spot) on oilseed rape (Brassica napus) leaves inoculated with ascospores or conidia at different temperatures and wetness durations
Karolewski, Z.; Evans, N.; Fitt, Bruce D.L.; Todd, A.D.; Baierl, A. (2002-10)In controlled environment experiments, sporulation of Pyrenopeziza brassicae was observed on leaves of oilseed rape inoculated with ascospores or conidia at temperatures from 8 to 20degreesC at all leaf wetness durations ... -
Visual and PCR assessment of light leaf spot (Pyrenopeziza brassicae) on winter oilseed rape (Brassica napus) cultivars
Karolewski, Z.; Fitt, Bruce D.L.; Latunde-Dada, A.O.; Foster, S.J.; Todd, A.D.; Downes, K.; Evans, N. (2006-06)Methods to assess light leaf spot (Pyrenopeziza brassicae) on winter oilseed rape cultivars were compared in laboratory, controlled-environment and field experiments. In controlled-environment experiments with seedling ...