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World Journal of Agricultural Research. 2017, 5(3), 162-168
DOI: 10.12691/WJAR-5-3-6
Original Research

Field Experiment to Evaluate the Efficacy of Different Doses of Chemical Fungicides against Rice Brown Leaf Spot Disease Caused by Bipolaris Oryzae L. at Paklihawa, Rupandehi, Nepal

Sunil Shrestha1, , Laxman Aryal2, Binaya Parajuli1, Jharana Panthi1, Pratibha Sharma1 and Yogendra Singh Saud1

1Institute of Agricultiure and Animal Science, Paklihawa Campus, Nepal

2Grain Legumes Research Program, Khajura, Banke, Nepal

Pub. Date: May 24, 2017
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Cite this paper

Sunil Shrestha, Laxman Aryal, Binaya Parajuli, Jharana Panthi, Pratibha Sharma and Yogendra Singh Saud. Field Experiment to Evaluate the Efficacy of Different Doses of Chemical Fungicides against Rice Brown Leaf Spot Disease Caused by Bipolaris Oryzae L. at Paklihawa, Rupandehi, Nepal. World Journal of Agricultural Research. 2017; 5(3):162-168. doi: 10.12691/WJAR-5-3-6

Abstract

Brown Leaf Spot of Rice, caused by the Pathogen Bipolaris oryzae, is one of the important rice diseases resulting in high yield reduction and poor grain quality. A field experiment was conducted to evaluate the efficacy of different doses of chemical fungicides against brown leaf spot in ‘SabhaMansuli’ variety of rice in the research field of Institute of Agriculture and Animal Sciences, Paklihawa Campus from July 15, 2015 to December 1, 2015. The experimental design was RCBD with three replications and ten treatments. Treatments comprised of three different chemical fungicides; SAAF® (Carbendazim 12% + Mancozeb 63%), Tilt® (Propiconazole 25 EC) & Bavistin® (Carbendazim 50% W.P.) at three different doses of 1.5, 2 & 2.5 g (or ml) and a control plot. Among the different fungicides, Tilt® at the rate of 2 ml/lit water showed significantly lowest AUDPC value (373.7) followed by SAAF® at 2 gm/lit (374.9) while the highest value was shown by Bavistin® at 2gm/lit (590.1).Similarly, highest economic yield was obtained in SAAF® at 2gm/lit (5.220 t/h) followed by Tilt® at 2ml/lit water (5.210t/ha) and the lowest in Bavistin® at 1.5gm/lit (3.320t/ha). So, among different chemical fungicides, SAAF® at 2gm/lit being efficient, economical and easily accessible, farmers could be suggested for reducing the disease severity and subsequent increase in the yield of rice.

Keywords

SAAF®, Tilt®, Bavistin®, brown leaf spot, Sabha Mansuli variety of rice

Copyright

Creative CommonsThis work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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