IJSRP, Volume 4, Issue 7, July 2014 Edition [ISSN 2250-3153]
Deepti Srivastava, Md.Shamim, Deepak Kumar, Pramila pandey, N.A. Khan and K.N.Singh
Rice blast is not only one of the earliest known plant disease but also one of the most widely distributed, occurring in every region of the world where rice grown. Ten isolates of Pyricularia oryzae causing rice blast disease were evaluated for their morphological, pathogenic, virulence and genetic characterization using RAPD marker. Isolates were classified into three groups based on pathogenicity viz. severely pathogenic, moderately pathogenic and mildly pathogenic and into four gropus i.e. PG-I, PG-II, PG-III and PG-IV based on cultural & morphological characteristics.