A New Combination Fungicide for the Management of Sheath Blight, Neck Blast, Brown Spot, False Smut and Grain Discolouration Diseases of Paddy on Farmers Field

Abstract

With the objective of searching suitable and practically applicable solution to the problems of low productivity due to fungal diseases in rice, this study was conducted at the farmers participatory on-farm trial on Rice var. MTU 7029 in the Sheikhpura district of Bihar during Kharif Season in the year 2012 and 2013 for the assessment of a New combination Fungicides in Integrated Disease Management (IDM) of Rice Fungal Diseases (Sheath Blight., Neck Blast, Brown Spot, False Smut & Grain Discoloration). A total of 10 farmers as replication with 0.4 ha each, under a total of 4 treatments (including farmers practice as a check) was included in the study. The spray of fungicides was done at the booting stage of rice crop followed by recording the data on severity of 5 fungal diseases and yield at the appropriate time. The mean result of 2 years indicated that the single spray of all the 3 technology options of fungicides combination significantly reduced all 5 fungal diseases along with corresponding enhancement of grain yield, net profit and BC ratio. Out of them Nativo 75 WG (Tebuconazole 50% + Trifloxystrobin 25% ) @ 0.05 %, reduced all 5 fungal diseases viz. Sheath blight, Neck Blast, Brown Spot, False Smut & Grain discolouration to a minimum level of  9.4, 4.2, 6.5, 8.1 and 3.3 percent respectively along with corresponding highest grain yield (5230 kg/ha), the net return of Rs.28900/ha and B:C ratio 2.24.  Both other combinations viz. Monceren 250 SC ( Pencycuron 22.9% SC) @ 0.12 % +Bavistin (Carbendazim) 50WP @ 0.1%  and Sheathmar (Validamycin 3% L) @ 0.25 %+ Bavistin (Carbendazim)  50WP @ 0.1 % resulted into significantly lower diseases level statistically at par of 12.1, 9.7, 8.5, 19.4 and 6.6 % respectively along with corresponding higher grain yield (4360 kg/ha), net return of Rs.20800/ha and B:C ratio 1.94 in comparison of  38.3, 15.5, 18.4,25.5 and 12.3 % diseases level resulting with 3720 kg/ha grain yield, Rs.15,700/ha as net profit and 1.73 as BC ratio in the Farmers practice. Hence it can be concluded that single spray of Nativo75 WG (Tebuconazole 50%+ Trifloxystrobin 25% ) @ 250 gram/ha in 500 litres of water at booting stage of Rice cultivar MTU 7029 may be highly effective method to manage major fungal diseases at farmers field and to get maximum net profit.