Molecular Variability Studies of Magnaporthe grisea and Their Application in Disease Control

  • Nicholas J. Talbot
Part of the The Mycota book series (MYCOTA, volume 11)

Abstract

The blast fungus Magnaporthe grisea (Hebert) Barr is an economically important pathogen of more than 50 grass species and causes severe disease in a number of important crop species, including rice, millets and wheat (Ou 1985; Rossman et al. 1990). The fungus is an ascomycete (anamorph Pyricularia grisea) and is closely related to other pathogenic fungi such as Gaeumannomyces graminis and Phialophora graminicola within the Magnaporthaceae (Mugnier 1999). M. grisea causes a foliar, leaf spot disease which is recognised by the presence of large oval lesions on the leaf surface that can coalesce in heavy infections and cause widespread necrosis of leaves. In older plants, the fungus can spread to the stems and grain and in rice this causes node, neck and panicle blast — significant diseases that can lead to complete loss of the harvest (Fig. 9.1).

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© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • Nicholas J. Talbot
    • 1
  1. 1.School of Biological Sciences, Washington Singer LaboratoriesUniversity of ExeterExeterUK

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