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dc.contributor.authorWest, Jon S.
dc.contributor.authorKharbanda, P. D.
dc.contributor.authorBarbetti, M. J.
dc.contributor.authorFitt, Bruce D.L.
dc.identifier.citationWest , J S , Kharbanda , P D , Barbetti , M J & Fitt , B D L 2001 , ' Epidemiology and management of Leptosphaeria maculans (phoma stem canker) on oilseed rape in Australia, Canada and Europe ' , Plant Pathology , vol. 50 , no. 1 , pp. 10-27 .
dc.identifier.otherPURE: 1402717
dc.identifier.otherPURE UUID: 9d711d95-bc2c-436b-933b-77a1a0ec57a1
dc.identifier.otherBibtex: urn:51da3d70670a0192232269e1f0e6deb2
dc.identifier.otherScopus: 0035114686
dc.description.abstractPhoma stem canker (blackleg), caused by Leptosphaeria maculans, is an important disease on oilseed rape (canola, rapeseed, Brassica napus, Brassica juncea, Brassica rapa) causing seedling death, lodging or early senescence in Australia, Canada and Europe, but not in China. The two forms of L. maculans (A group and B group) that occur on oilseed rape are now considered to be separate species. The epidemiology and severity of phoma stem canker differs between continents due to differences in the pathogen population structure, oilseed rape species and cultivars grown, climate and agricultural practices. Epidemics are most severe in Australia, where only the A group occurs, and can be damaging in Canada and western Europe, where both A and B groups occur, although their proportions vary within regions and throughout the year. Epidemics are slight in China, where the A group has not been found. Dry climates (Australia, western Canada) lengthen the persistence of infected debris and may synchronize the release of airborne ascospores (after rain) with seedling emergence. L. maculans spreads from cotyledon and leaf infections down petioles to reach the stem, with infections on cotyledons and leaves early in the season producing the most damaging stem cankers at the stem base (crown). Development of both crown cankers and phoma stem lesions higher up stems is most rapid in regions with high temperatures from flowering to harvest, such as Australia and Canada. Breeding for resistance (genetic, disease escape or tolerance), stubble management, crop rotation and fungicide seed treatments are important strategies for control of phoma stem canker in all areas. Fungicide spray treatments are justified only in regions such as western Europe where high yields are obtained, and accurate forecasts of epidemic severity are needed to optimize their use.en
dc.relation.ispartofPlant Pathology
dc.subjectA group and B group
dc.subjectcrown canker
dc.subjectphoma leaf spot
dc.subjectPhoma lingam
dc.titleEpidemiology and management of Leptosphaeria maculans (phoma stem canker) on oilseed rape in Australia, Canada and Europeen
dc.contributor.institutionDepartment of Human and Environmental Sciences
dc.contributor.institutionHealth & Human Sciences Research Institute
dc.contributor.institutionGeography, Environment and Agriculture
dc.contributor.institutionCrop and Environmental Protection
dc.contributor.institutionSchool of Life and Medical Sciences
dc.description.statusPeer reviewed
rioxxterms.typeJournal Article/Review

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