Agricultural Science Digest

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Agricultural Science Digest, volume 37 issue 3 (september 2017) : 247-248

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

Akhilesh Kumar Kulmitra, Neha Sahu, V.B. Sanath Kumar, Thejesha A.G., Amlan Ghosh, Yasmin Gulnaz
1Department of Plant Pathology, University of Agricultural Sciences, Gandhi Krishi Vignan Kendra, Bangalore-560065, Karnataka, India.
Cite article:- Kulmitra Kumar Akhilesh, Sahu Neha, Kumar Sanath V.B., A.G. Thejesha, Ghosh Amlan, Gulnaz Yasmin (2017). In vitro evaluation of bio-agents against Pyricularia oryzae (Cav.) causing rice blast disease. Agricultural Science Digest. 37(3): 247-248. doi: 10.18805/asd.v37i03.8989.
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. 
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