DISEASE SEVERITY AND YIELD LOSSES CAUSED BY FALSE SMUT DISEASE OF RICE IN DIFFERENT RICE ECOSYSTEMS OF KARNATAKA

K.M. MUNIRAJU¹, D. PRAMESH²*, S.B. MALLESH³, K. MALLIKARJUN⁴, G.S. GURUPRASAD^5
1Department of Plant Pathology, University of Agricultural Sciences, Raichur, 584 104, India
²All India Co-Ordinated Rice Improvement Programme, University of Agricultural Sciences, Raichur, 584 104, India
³Department of Plant Pathology, University of Agricultural Sciences, Raichur, 584 104, India
⁴Department of Plant Pathology, University of Agricultural Sciences, Raichur, 584 104, India
⁵All India Co-Ordinated Rice Improvement Programme, University of Agricultural Sciences, Raichur, 584 104, India
* Corresponding Author : parmi.iari@gmail.com

Received : 07-08-2017     Accepted : 28-09-2017     Published : 28-10-2017
Volume : 9     Issue : 10       Pages : 963 - 966
Int J Microbiol Res 9.10 (2017):963-966

Keywords : False smut, Survey, Ecosystem, Yield loss
Academic Editor : Indu V. R.
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to the Director of Research, UAS Raichur for providing the necessary research facilities. We are also thankful to Head, Division of Plant Pathology and Head, ARS, Gangavathi for providing laboratory and field facilities.
Author Contribution : MKM and PD planned the work, conducted survey, analyzed the data, and wrote manuscript. MSB, MK and GSG gave comments and inputs to the manuscript

A rowing survey was carried out during Kharif 2016 in different rice growing ecosystems of Karnataka to ascertain the false smut disease of rice. In different surveyed ecosystem, the mean disease severity was ranged from 4.44 to 17.12 percent. The highest disease severity was observed in irrigated Bhadra ecosystem (17.12%), whereas, irrigated Kaveri ecosystem recorded least disease severity (4.44%). Yield loss estimation due to false smut disease on different rice varieties growing in different ecosystem revealed up to 4.25 percent yield loss. Maximum disease severity was observed on the cv. Sriram Gold (124.58 %) with yield loss of 4.25 percent, and least disease severity was observed on cv. Thella Hamsa (2.64 %) with yield loss of 0.09 percent. The information generated could be useful for making the ecosystem specific management strategy to reduce the impact of false smut disease in different rice ecosystem of Karnataka.

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