In vitro Management of Rhizoctonia solani causing Sheath Blight Disease of Rice in North Bihar

Author: M.K. Roy, A.S. Kotasthane and S. Kumar

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Abstract

Rice (Oryza sativa L.) is an important staple cereal food crop all over the world, but it is widely grown in South East Asian countries. India is the second largest producer and consumer of rice at global level; however, the crop suffers from a number of biotic and abiotic stresses. Among them sheath blight caused by Rhizoctonia solani is one of the most devastating diseases of rice, which causes yield loss upto 50 %. While investigating suitable in vitro management, it was found that among four botanicals (Datura, Neem, Garlic & Clerodendrum) Neem extracts at 20 % concentration found to inhibit the maximum mycelial growth (74.88 %) while datura extract at 20 % concentration found to be least effective (65.44 %). Tr-2 resulted in maximum inhibition of growth (75.55 %) followed by Tr-3 (72.03 %) while least inhibition percentage by Tr-5 (62.96 %) out of five tested Trichoderma isolates. Hexaconazole 5 % EC was found most effective fungicide in terms of growth inhibition percentage at 200 ppm (97.22 %) while least inhibition percentage was found in case of Azoxystrobin 23 % w/w (79.25).

Keywords

R. solani, fungicides, botanicals, Trichoderma, Rice

Conclusion

From the above result it is being concluded that among botanicals, Neem extract at 20% concentration, Hexaconazole 5% EC at 200 ppm and Trichoderma-2 resulted in maximum growth inhibition of R. solani.

References

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How to cite this article

M.K. Roy, A.S. Kotasthane and S. Kumar (2022). In vitro Management of Rhizoctonia solani causing Sheath Blight Disease of Rice in North Bihar. Biological Forum – An International Journal, 14(4): 432-435.