Resumen

RIVERO GONZALEZ, Deyanira et al. Fungi associated to grain spotting in the INCA LP-5 (Oryza sativa L.) variety of rice in Cuba. Rev. Soc. Ven. Microbiol. [online]. 2012, vol.32, n.2, pp.131-138. ISSN 1315-2556.

Isolation and identification of the fungi present in spotted rice grains of the INC LP-5 variety, harvested during the rainy seasons of the years 2003 and 2005, was done at sites of the Experimental Rice Station “Los Palacios”, Pinar del Río, belonging to the Instituto Nacional de Ciencias Agrícolas (INCA). Incidence was determined, and pathogenicity tests were carried out according to Koch’s postulates. Thirty-five species corresponding to 19 fungi genus associated to spotted grains of the INCA-LP-5 variety were identified, and among them, the following strains were indicated as new registrations associated to spotting of rice grains in Cuba: Bipolaris maydis, Fusarium merismoides, F. solani, F. subglutinans, Penicillium itallicum, Phoma medicaginis var. pinodella and Syncephalastrum racemosum. The fungi with the highest incidence were Bipolaris oryzae, Sarocladium oryzae and species of the genus Alternaria, Fusarium, Curvularia and Phoma. It was confirmed that the fungi F. subglutinans, B. oryzae, A. padwickii, Alternaria sp., F verticilloides, C. lunata, C.lunata var. aeria, C. pallescens, C. senegalensis, Curvularia sp., and S. oryzae, are causative agents of the spotting of rice grains.

Palabras clave : rice; spotting of grains; phytopathogenic fungi; frequency; pathogenicity.

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