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Conditions for infection of winter oilseed rape leaves by conidia and ascospores of Pyrenopeziza brassicae, causing light leaf spot
Gilles, T.; Fitt, Bruce D.L.; Jeger, M.J. (1999)The optimum temperature for infection of oilseed rape leaves by P. brassicae conidia was c.16°C; an increase of temperature above the optimum and a decrease of temperature below the optimum decreased infection by conidia. ... -
Development of Pyrenopeziza brassicae apothecia on agar and oilseed rape debris
Gilles, T.; Ashby, A.M.; Fitt, Bruce D.L.; Cole, T. (2001-06)The development of apothecia of Pyrenopeziza brassicae (anamorph Cylindrosporium concentricum) on oilseed rape debris and compost malt agar was observed by scanning electron and light microscopy. On oilseed rape debris, ... -
Effects of environmental factors on development of Pyrenopeziza brassicae (light leaf spot) apothecia on oilseed rape debris
Gilles, T.; Fitt, Bruce D.L.; Jeger, M.J. (2001-04)The development of Pyrenopeziza brassicae (light leaf spot) apothecia was studied on petiole debris from artificially infected oilseed rape leaves incubated at temperatures from 6 to 22 degreesC under different wetness ... -
Effects of temperature and wetness duration on conidial infection, latent period and asexual sporulation of Pyrenopeziza brassicae on leaves of oilseed rape
Gilles, T.; Fitt, Bruce D.L.; Kennedy, R.; Welham, S.J.; Jeger, M.J. (2000-08)Experiments in controlled environments were carried out to determine the effects of temperature and leaf wetness duration on infection of oilseed rape leaves by conidia of the light leaf spot pathogen, Pyrenopeziza brassicae. ... -
Effects of temperature and wetness duration on infection of winter oilseed rape leaves by Pyrenopeziza brassicae
Gilles, T.; Fitt, Bruce D.L.; Jeger, M.J. (1998)Light leaf spot, caused by Pyrenopeziza brassicae Sutton and Rawlinson (anamorph Cylindrosporium concentricum) is responsible for considerable yield losses in winter oilseed rape crops in the UK. A provisional version of ... -
Epidemiology in relation to methods for forecasting light leaf spot (Pyrenopeziza brassicae) severity on winter oilseed rape (Brassica napus) in the UK
Gilles, T.; Evans, N.; Fitt, Bruce D.L.; Jeger, Michael J. (2000-09)Pyrenopeziza brassicae, cause of light leaf spot of oilseed rape, has a complex polycyclic life cycle. It can be difficult to control light leaf spot in winter oilseed rape in the UK since it is not easy to optimise fungicide ... -
Infectivity of ascospores of Pyrenopeziza brassicae on leaves and factors affecting maturation of apothecia on debris of oilseed rape
Gilles, T.; Fitt, Bruce D.L. (Association of Applied Biologists, 1999) -
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 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 ... -
The roles of ascospores and conidia of Pyrenopeziza brassicae in light leaf spot epidemics on winter oilseed rape (Brassica napus) in the UK
Gilles, T.; Fitt, Bruce D.L.; McCartney, H. A.; Papastamati, K.; Steed, J. M. (2001)Ascospores of Pyrenopeziza brassicae were produced in apothecia (cup-shaped ascomata) on oilseed rape debris. The conidia, which were morphologically identical to the ascospores, were produced in acervular conidiomata on ...