Abstract

QUINTANA, Lidia; GUTIERREZ, Susana; SOTOMAYOR, Nilsa  and  VIGO, R.. Fungi associated to Echinochloa colona in rice production áreas in Paraguay. Rev. Soc. cient. Parag. [online]. 2020, vol.25, n.1, pp.32-40. ISSN 2617-4731.  https://doi.org/10.32480/rscp.2020-25-1.32-40.

E. colona, E. crusgalli and E.oryzicola are among the most important groups of weeds in paddy fields. These weeds, in addition to causing a reduction in yield, can host phytopathogenic fungi for rice crop. The research work was carried out during the 2015/2016 rice cycle with the aim of identify and characterize fungal species associated with the rice weed. 150 samples of Echinochloacolona plants were randomly collected in commercial rice fields. Routine techniques was used for the study of plant diseases such as humid chambers, in vitro cultures, isolations, and morphometric studies of microorganisms. As a result of these activities, were indentified 4 fungi genera associated with the mentioned weed: Curvularia lunata, Bipolaris oryzae. Alternaria padwickii y Alternaria spp. C.lunata register the higher incidence (92%).

Keywords : Oryza sativa; weed; Echinochloa; fungi.

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