Jahaar Singh1&2*, R. K. Dantre1, B. Bhaskar2, S. Vijay Kumar2 and M. Srinivas Prasad2
1Department of Plant Pathology, IGKV-RMDCARS, Ambikapur-497001, Chhattisgarh, India.
2Department of Plant Pathology, ICAR- Indian Institute of Rice Research, Hyderabad-500030.
Email:singhjahaar4890@gmail.com
Received-17.06.2019, Revised-14.07.2019
Abstract: The fungus Pyricularia oryzae Cavara is the causal agent of rice blast disease. Yield reduction of 10-20% in susceptible rice varieties but in severe cases the yield loss caused by P. oryzae may reach upto 80-100%. The highly significant differences were observed among the 63 blast isolates in pathogenicity test. The highest PDI 96.30 per cent was recorded in four isolates and the lowest PDI 51.85 per cent were found in sixteen isolates.
Keywords: Rice blast, P. oryzae, PDI, Pathogenicity
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