Abstract: Curvularia species causing black kernel of rice have been tested
in 150 samples of three varieties of boro rice seed. Five species of Curvularia,
viz. Curvularia geniculata, Curvularia oryzae, Curvularia lunata,
Curvularia eragrostidis and Curvularia intermedia have been
detected. The seed infection was higher in case of Curvularia lunata
(5.5 %) than other species. Species were detected by studying the
growth habit of fungus on seeds, shape, diagnostic characters and appearance
of conidia under compound microscope.