Resumo

LEYVA MIR, Santos Gerardo; MARISCAL AMARO, Luis Antonio; VILLASENOR MIR, Héctor Eduardo  e  HUERTA ESPINO, Julio. Diplodia sp., Cause of Oat Grain Decay (Avena sativa) in Nanacamilpa, Tlaxcala, Mexico. Rev. mex. fitopatol [online]. 2011, vol.29, n.1, pp.81-89. ISSN 2007-8080.

For to identify the causal agent of the rot of oat grain, infected grains of oat var. 'Chihuahua' were collected in Nanacamilpa, Tlaxcala, Mexico. Were carried out the Koch's postulates and the pathogen was identified using taxonomic keys for genus. Were observed dark brown spherical pycnidia, and bicellular and fusiform conidia with a papillated ostiole and measures of 17.6 to 26.4 x 4.4 to 8.8 μm. It was concluded that the fungus belong to genus Diplodia sp. The identification concerning species was not done for being the first report of this genus in oat.

Palavras-chave : Causal agent; rot; Diplodia sp.

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