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A literature revue: tan spot on wheat

Author:
Benslimane, H.
Source:
Bulletin OEPP 2015 v.45 no.1 pp. 52-65
ISSN:
0250-8052
Subject:
Pyrenophora tritici-repentis, chlorosis, epidemiology, necrosis, pathogens, races, toxins, wheat
Abstract:
Tan spot caused by Pyrenophora tritici-repentis is a wheat disease found worldwide which can cause significant losses. This disease is characterized by typical symptoms: a necrotic spot surrounded by chlorosis halo. On the basis of its ability to produce chlorosis and/or necrosis symptoms on a differential host set. Eight races of this pathogen are currently recognized. These symptoms are the result of a specific interaction between the host and at least three host specific toxins Ptr ToxA, Ptr ToxB and Ptr ToxC. This interaction seems to be a mirror image of the classical gene-for-gene described by Flore. This paper presents a first literature review in the French language, identifying the major aspects of this disease, its epidemiology and diversity of its causal agent.
Agid:
1325519