Journal of Eco-friendly Agriculture
Year : 2016, Volume : 11, Issue : 1
First page : ( 70) Last page : ( 73)
Print ISSN : 2229-628X. Online ISSN : 2582-2683.

Bio-efficacy of fungicides against sheath blight disease of rice caused by Rhizoctonia solani

Chandra Ram

Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi – 221 005, Uttar Pradesh, India. E-mail: rcrbhumpp@yahoo.com, rcrbhumpp@rediff.mail.com

Online published on 30 November, 2019.

Abstract

The present work deals with the bio-efficacy of new fungicides as alternative to the current control practices of sheath blight of rice (Oryza sativa L.) caused by Rhizoctonia solani Kuhn. Fungicides Flusilazole 40% EC (New Source), Hexaconazole 5% EC (Hexadhan), Valydamycin 3% SL (Sheathmar), Kresoxim methyl 44.3% SC (Ergon), Carbendazim 25% + Flusilazole 12.5% SE (New Source) and Carbendazim 25% + Flusilazole 12.5% SE (Market Sample) were sprayed at the initiation of sheath blight of rice in field condition during Kharif 2013 and 2014. Percentage of diseases index (PDI) was observed and found Percent Disease Index (PDI) before spray treatment ranged from 5.67 to 6.89 per cent in different treatments and control. Flusilazole 40% EC (New source) and Flusilazole 40% EC (Market sample) both @ 120 g a.i./ha recorded significantly less PDI in comparison to check fungicides, Hexaconazole 5% EC and Validamycin 3% SL. However, Kresoxim methyl 44.3% SC and Carbendazim 25% + Flusilazole 12.5% SE (New source) and Carbendazim 25% + Flusilazole 12.5% SE (Market sample) was recorded highest in both the years. Grain yield was also observed and recorded on plot basis and expressed as q/ha. Result show that the highest yield of rice grain was obtained from application of Carbendazim 25% + Flusilazole 12.5% SE where it was recorded 41.20 q ha¹ in 2013 and 43.10 q ha⁻¹ in 2014.

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Keywords

Rhizoctonia solani, fungicides, PDI, grain yield.

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