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Vol. 11, Special Issue 7 (2022)

Control of prevailing diseases in rapeseed-mustard

Author(s):
RN Sharma and S Mureliya
Abstract:
A field trial was laid out at Agricultural Research Station (Sri Karan Narendra Agriculture University, Jobner), Navgaon - Alwar (Rajasthan) to test the efficacy of fungicides against prevailing diseases (white rust and Alternaria blight) of rapeseed-mustard using highly susceptible variety ‘Varuna’ (Brassica juncea L.) during the crop season of rabi 2015-16. Five fungicides viz., mancozeb 75% WP (0.2%), metalaxyl 8% + mancozeb 64% WP (0.2%), hexaconazole 5% EC (0.05%), difenconazole 25% EC (0.05%) and propiconazole 25% EC (0.05%) were tested for their efficacy alone as single spray at 45 days after sowing (DAS) and in combination with mancozeb at 45 DAS followed by spray of other four fungicides individually at 60 DAS. The spray of different fungicides alone as single spray treatment or each fungicide in succession with mancozeb (0.2%) significantly reduced the both diseases over control, however, the level of efficacy varied among the treatments. The treatment containing single spray of mancozeb 75% WP (0.2%) followed by single spray of metalaxyl 8% + mancozeb 64% WP (0.2%) performed best in respect of white rust disease control as well as grain yield concerned, where, lowest white rust disease intensity (1.40%) and highest grain yield (13.48 q/ha) was recorded. Single spray of mancozeb 75% WP @ 0.2% followed by single spray of hexaconazole 5% EC (0.05%) was found to be the next in order of efficacy against the white rust disease, showed 2.77 per cent disease intensity (PDI) and 12.94 q/ha yield. In case of Alternaria blight disease, single spray of mancozeb 75% WP @ 0.2% followed by single spray of hexaconazole 5% EC (0.05%) proved most effective which allowed least disease intensity (2.07%) and differed non-significantly with the treatment of single spray of mancozeb 75% WP (0.2%) followed by single spray of propiconazole 25% EC (0.05%) with 2.10 PDI. However, maximum IBCR (9.57) was noted in treatment containing single spray of hexaconazole 5% EC @ 0.05% followed by the treatment of mancozeb 75% WP @ 0.2% followed by single spray of hexaconazole 5% EC @ 0.05% (5.42) due to low cost of hexaconazole fungicide.
Pages: 43-46  |  580 Views  232 Downloads
How to cite this article:
RN Sharma and S Mureliya. Control of prevailing diseases in rapeseed-mustard. The Pharma Innovation Journal. 2022; 11(7S): 43-46.

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