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Effects of timing of Leptosphaeria maculans ascospore release and fungicide regime on phoma leaf spot and phoma stem canker development on winter oilseed rape (Brassica napus) in southern England

West, Jon S.; Fitt, Bruce D.L.; Leech, P. K.; Biddulph, J. E.; Huang, Yongju; Balesdent, M. H. (2002-08)

At Rothamsted during 1997/98, 1998/99 and 1999/2000 winter oilseed rape growing seasons, numbers of air-borne ascospores of Leptosphaeria maculans were often > 4 m(-3) from autumn (September/October) to spring (April/May), ...

Colonization of winter oilseed rape tissues by A/Tox(+) and B/Tox(0) Leptosphaeria maculans (phoma stem canker) in France and England

West, Jon S.; Balesdent, M. H.; Rouxel, T.; Narcy, J. P.; Huang, Yongju; Roux, J.; Steed, J. M.; Fitt, Bruce D.L.; Schmit, J. (2002-06)

The colonization of winter oilseed rape plants and epidemiology of phoma stem canker differed between A/Tox(+) and B /Tox(0) Leptosphaeria maculans. In France and England, where plant colonization was investigated during ...

New perspectives on the epidemiology and management of phoma stem canker of winter oilseed rape in England

West, Jon S.; Huang, Yongju; Steed, J. M.; Leech, P. K.; Fitt, Bruce D.L.; Gladders, P. (British Crop Protection Council, 2002)

The epidemiology of phoma stem canker (Leptosphaeria maculans) on winter oilseed rape will be discussed in relation to results of experiments comparing fungicide regimes in southern England. Factors affecting the severity ...

Maturation of ascospores of A-group and B-group Leptosphaeria maculans (stem canker) on winter oilseed rape debris

Huang, Yongju; Fitt, Bruce D.L.; Hall, Avice (British Crop Protection Council, 2002)

Ascospores of both A-group and B-group L. maculans matured faster at 15-20degreesC than at 5-10degreesC. At 5-10degreesC, maturation of B-group ascospores was slower than that of A-group ascospores but there was no difference ...