Fungi associated with banana leaf diseases in South Africa

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dc.contributor.advisor Viljoen, Adrienne en
dc.contributor.coadvisor Crous, Pedro W. en
dc.contributor.coadvisor Wehner, F.C. en
dc.contributor.postgraduate Surridge, Angela Karen Joanna en
dc.date.accessioned 2013-09-07T00:28:44Z
dc.date.available 2005-06-24 en
dc.date.available 2013-09-07T00:28:44Z
dc.date.created 2003-04-01 en
dc.date.issued 2006-06-24 en
dc.date.submitted 2005-06-24 en
dc.description Dissertation (MSc (Microbiology))--University of Pretoria, 2006. en
dc.description.abstract Leaf diseases are an integral part of banana production. While currently not a cause for major concern in South Africa, many of these diseases van reach epidemic proportions and cause severe crop loss. To determine the present status of leaf diseases in South Africa, a survey was conducted in the five banana-growing regions of the country. The study indicated the following: Yello Sigatoka, caused by Mycosphaerella musicola was the most prevalent disease and occurred in all five the regions. Mycosphaerella speckle and Cordana leaf spot, caused by M. musae and Cornana musae respectively, were present in four regions. Cladosporium speckle, caused by Cladosporium musae, was found only in the Levubu area. Various other fungi, mainly saprobes and endophytes, were also isolated. The most commonly encountered species included Alternaria alternate, Colletrichum gloeosporioides, Nigrospora oryzae, N. sacchari, N. Spaerica, Pestalotiopsis sp., Phoma glomerata, Selenophoma asterina and S. juncea. Following morphological identification of the pathogenic species, monoconidial isolates were established from representative isolates of each and their virulence confirmed in artificial inoculation studies. The identity of M. musciola and Cladosporium musae was verified molecularly by means of species-specific primers and/or sequencing of the ITS region. Validation of the identity of Cladosporium musae constitutes the first report of Cladosporium speckle on banana in South Africa. Sequence data of the ITS region of isolates from Mycospaerella speckle lesions indicated that the symptoms are caused by two species, M. musae and one closely related to M. colombiensis, the latter previously described only from lesions on leaves of Eucalyptus urophylla in Colombia. en
dc.description.availability unrestricted en
dc.description.department Microbiology and Plant Pathology en
dc.identifier.citation Surridge, A 2003, Fungi associated with banana leaf diseases in South Africa, MSc dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/25782 > en
dc.identifier.upetdurl http://upetd.up.ac.za/thesis/available/etd-06242005-121459/ en
dc.identifier.uri http://hdl.handle.net/2263/25782
dc.language.iso en
dc.publisher University of Pretoria en_ZA
dc.rights © 2003, University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. en
dc.subject Banana diseases south africa en
dc.subject Fungal diseases south africa en
dc.subject Pests south africa en
dc.subject UCTD en_US
dc.title Fungi associated with banana leaf diseases in South Africa en
dc.type Dissertation en


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