A New Combination Fungicide Active Ingredients for Management of Sheath Blight Disease of Paddy

D. Pramesh *

All India Coordinated Rice Improvement Programme, Agricultural Research Station, Gangavathi, Karnataka, Pin-583 227, India and Department of Plant Pathology, University of Agricultural Sciences, Raichur, Karnataka, India

Maruti .

All India Coordinated Rice Improvement Programme, Agricultural Research Station, Gangavathi, Karnataka, Pin-583 227, India and Department of Plant Pathology, University of Agricultural Sciences, Raichur, Karnataka, India

A. Saddamhusen

Department of Plant Pathology, University of Agricultural Sciences, Raichur, Karnataka, India

K. M. Muniraju

All India Coordinated Rice Improvement Programme, Agricultural Research Station, Gangavathi, Karnataka, Pin-583 227, India and Department of Plant Pathology, University of Agricultural Sciences, Raichur, Karnataka, India

G. S. Guruprasad

All India Coordinated Rice Improvement Programme, Agricultural Research Station, Gangavathi, Karnataka, Pin-583 227, India

*Author to whom correspondence should be addressed.


Abstract

Aims: Present study was under taken to determine the field efficacy of a new combination fungicide azoxystrobin 11% + tebuconazole 18.3% w/w SC against sheath blight disease of rice.

Study Design: Randomized complete block design (RCBD).

Place and Duration of Study: All India Co-ordinated Rice improvement Programme, Agricultural Research Station, Gangavathi (5.4319° N, 76.5315° E), Karnataka, India, during Kharif  2014 and Rabi 2014-15.

Methodology: Experiment was designed with seven treatments of three replications each. A new formulations viz., azoxystrobin 11% + tebuconazole 18.3% w/w SC was tested in three dosages (500, 750 & 1000 g/ha) along with other fungicidal treatments such as  azoxystrobin 23% SC at 500 gm/ha, tebuconazole 25.9% EC at 750 g/ha and validamycin 3% L at 2000 g/ha. Bioefficacy was analysed after spraying all the test chemicals thrice at 15 days interval starting from initiation of the disease.

Results: The combination fungicide azoxystrobin 11% + tebuconazole 18.3% w/w SC at 1000 ml/ha was found effective against sheath blight disease recording least percent disease index (PDI) of 10.93 during Kharif 2014. Similar result was observed in Rabi 2014-15 where same test fungicide azoxystrobin 11% + tebuconazole 18.3% at 1000 ml/ha recorded the least PDI of 11.60. Compared to azoxystrobin 11% + tebuconazole 18.3%, other test fungicides such as azoxystrobin 23% SC, tebuconazole 25.9% EC and validamycin 3% L recorded highest PDI in both Kharif 2014 and Rabi 2014-15. Significant increases in the grain yield over other treatments (7527 kg/ha) was observed in the plots treated with test chemical azoxystrobin 11% + tebuconazole 18.3% w/w SC at 1000 ml/ha in Kharif 2014 and  5796 kg/ha in Rabi 2014-15. Whereas, other fungicidal treatments recorded the yield range of 5925-6217 kg/ha in Kharif 2014 and 4584 – 5682 kg/ha in Rabi 2014-15.

Conclusion: Present investigation  provides the field efficacy of the fungicide mixture Azoxystrobin 11% + Tebuconazole 18.3% w/w SC  at 750-1000 ml/ha for management of sheath blight disease of paddy.

Keywords: Rice, azoxystrobin, tebuconazole, sheath blight, percent disease index, Rhizoctonia solani


How to Cite

Pramesh, D., Maruti ., A. Saddamhusen, K. M. Muniraju, and G. S. Guruprasad. 2017. “A New Combination Fungicide Active Ingredients for Management of Sheath Blight Disease of Paddy”. Advances in Research 8 (5):1-7. https://doi.org/10.9734/AIR/2016/31774.

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