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FIELD EXPERIMENT TO EVALUATE THE EFFICIENCY OF DIFFERENT CHEMICAL FUNGICIDES IN SABHA MANSULI VARIETY OF RICE AGAINST BROWN LEAF SPOT (Bipolaris oryzae) AT IAAS, PAKLIHAWA, RUPANDEHI
jharana panthi, Yogendra Singh saud, Yogendra Singh saud, Sunil Shrestha, Sunil Shrestha, Pratibha Sharma, Pratibha Sharma, Binaya parajuli, Binaya parajuli

Last modified: 2017-08-31

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 fungicides against brown leaf spot in ‘Sabha Mansuli’ 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 4 treatments. Treatments comprised of three different fungicides; SAAF (Carbendazim 12% + Mancozeb 63%), Tilt (Propiconazole) & Bavistin (Carbendazim 50% W.P.) at a doses of 2 gm (or ml) and a control plot. Among the different fungicides, Tilt @ 2 ml/ltr Showed significantly lowest mean Area Under Disease Progress Curve (AUDPC) value (373.7) followed by SAAF@ 2 gm/ltr (374.9) while the highest value was shown by bavistin @2gm/l (590.1).Similarly, highest economic yield was obtained in SAAF (5.220 ta/h) followed by Tilt (5.210t/ha) and the lowest in Bavistin (3.320t/ha). So, among different chemical fungicides, SAAF 2gm/ltr being efficient, economical and easily accessible among the farmers could be suggested for reducing the disease incidence and subsequent increase in the yield of rice.

Keywords: brown leaf spot, rice, pathogen


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