HomeInternational Rice Research Notesvol. 22 no. 2 (1997)

Variation in Isolates of Sclerotium Oryzae, The Rice Stem Rot Pathogen

Z Ali

Discipline: Agriculture



Sclerotium oryzae (conidial state, Helminthosporium sigmoideum Cav., and ascigerous state, Magnaporthe salvinii Krause and Webster) is the causal agent of stem rot of rice. It causes significant yield losses in India and neighboring countries. The pathogen varies in morphological and cultural behavior even among the isolates collected from the same geographic area. We studied the variability of five isolates collected from Bangladesh (SO-B), India (SO-I), Nepal (SO-N), Pakistan (SO-P), and Sri Lanka (SO-S) to document cultural, sclerotial, and other characters.