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Browsing by Author "Steed, J.M."
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Diagnosis of light leaf spot (Pyrenopeziza brassicae) on winter oilseed rape (Brassica napus) in the UK
Fitt, Bruce D.L.; Doughty, K.J.; Gladders, P.; Steed, J.M.; Sutherland, K.G. (1998-10)Light leaf spot lesions were generally first observed as light green areas on leaves of UK winter oilseed rape crops in January or February and later became brittle and bleached. Elongated lesions, which were brown with ... -
Factors affecting development of phoma canker (Leptosphaeria maculans) on stems of winter oilseed rape (Brassica napus) in southern England
Sun, P.; Fitt, Bruce D.L.; Steed, J.M.; Underwood, C.T.; West, Jon S. (2001)In winter oilseed rape experiments at Rothamsted in 1997/98 (cvs Lipton and Capitol), 1998/99 (cv. Apex) and 1999/2000 (cvs Apex, Lipton and Capitol), development of crown canker and phoma stem lesions in spring was related ... -
Methods for assessment of light leaf spot (Pyrenopeziza brassicae) on winter oilseed rape (Brassica napus) in the UK
Fitt, Bruce D.L.; Doughty, K.J.; Gilles, T.; Gladders, P.; Steed, J.M.; Su, H.; Sutherland, K.G. (1998-12)Light leaf spot (Pyrenopeziza brassicae) was assessed as % plants with light leaf spot, % leaves with light leaf spot or % leaf area with light leaf spot in winter oilseed rape field experiments done at different sites ... -
Modelling the daily progress of light leaf spot epidemics on winter oilseed rape (Brassica napus), in relation to Pyrenopeziza brassicae inoculum concentrations and weather factors
Papastamati, K.; Van Den Bosch, F.; Welham, S.J.; Fitt, Bruce D.L.; Evans, N.; Steed, J.M. (2002-02-15)The progress of light leaf spot (Pyrenopeziza brassicae) epidemics on winter oilseed rape was monitored in 1998/99 and 1999/2000 at Rothamsted, and weather factors and P. brassicae ascospore concentrations were recorded ... -
Modelling the effects of temperature and wetness duration on development of light leaf spot on oilseed rape leaves inoculated with Pyrenopeziza brassicae conidia
Gilles, T.; Fitt, Bruce D.L.; Welham, S.J.; Evans, N.; Steed, J.M.; Jeger, M.J. (2001-02)A model was developed to describe the effects of temperature and leaf wetness duration in controlled-environment experiments on the development of light leaf spot on oilseed rape (cv. Bristol) leaves inoculated with ...