University of Hertfordshire

By the same authors

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Original languageEnglish
Title of host publicationProceedings of the BCPC Crop Protection Conference - Pests and Diseases
Place of PublicationFarnham
PublisherBritish Crop Protection Council
Number of pages6
ISBN (Print)1-901396-62-2
Publication statusPublished - 2002
EventBCPC International Conference on Pests and Diseases - Brighton
Duration: 18 Nov 200221 Nov 2002


ConferenceBCPC International Conference on Pests and Diseases


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 of epidemics in England include: 1. The population of L. maculans; A-group and B-group L. maculans differ in ascospore germination, penetration of leaves, leaf spot symptoms and position and severity of stem cankers/lesions. 2. Maturation of ascospores; seasons differ in the timing of ascospore release and phoma leaf spotting, and the subsequent timing and severity of stem canker development. 3. Timing of fu ngicide application; one or two fungicide sprays can give good control of the disease but inaccurately timed applications are ineffective. These results will be discussed in relation to strategies for management of phoma stem canker, including agronomic practices (e.g. sowing date), forecasting severity of epidemics and optimising fungicide use for effective disease control.

ID: 816505