In vitro evaluation of bio-agents against Pyricularia oryzae (Cav.) causing rice blast disease

DOI: 10.18805/asd.v37i03.8989    | Article Id: D-4623 | Page : 247-248
Citation :- In vitro evaluation of bio-agents against Pyricularia oryzae (Cav.) causing rice blast disease.Agricultural Science Digest.2017.(37):247-248
Akhilesh Kumar Kulmitra, Neha Sahu, V.B. Sanath Kumar, Thejesha A.G., Amlan Ghosh and Yasmin Gulnaz akhilesh.patho@gmail.com
Address : Department of Plant Pathology, University of Agricultural Sciences, Gandhi Krishi Vignan Kendra, Bangalore-560065, Karnataka, India.
Submitted Date : 6-06-2017
Accepted Date : 24-07-2017


The five different bio-agents viz., Trichoderma viride, T. harzianum, T. virens, Pseudomonas fluorescens and Bacillus subtilis were evaluated against Pyricularia oryzae at four and eight days after incubation through dual culture technique. Among the five different bio-agents, highest per cent inhibition of mycelial growth of fungus was recorded in T. virens i.e. 67 per cent and 70 percent after four and eight days after incubation respectively with mean of 68.5 per cent followed by Trichoderma viride with the inhibition of 61 and 63 per cent respectively with mean of 62 per cent. The Pseudomonas fluorescens did not show any inhibition of mycelial growth of P. oryzae as the pathogen over grew the bio-agents. 


Bio-agents Dual culture technique Pyricularia oryzae.


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