National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
A field experiment was conducted to assess the effect of novel fungicides against the purple blotch disease in onion during Rabi 2016-17 and 2017-18 at the Regional Research and Technology Transfer Station (OUAT), Bhawanipatna in the Western Undulating Zone of Odisha. The experiment was laid out in randomized block design with eight treatments in three replications. The treatment combinations consist of seed treating chemical (Vitavax power) along with the new fungicides against the purple blotch in onion. The percentage diseases index (PDI) of purple blotch in onion varied from 28.67% to 65.33%. Seed treatment with Vitavax power @ 0.2% along with foliar application of Tebuconazol 25 EC @ 1 ml l-1 was most effective in reducing the PDI (28.67 %) which was at par with Azoxystrobin 23 SC @ 1 ml l-1 with PDI of 31.33 %. Similarly, application of Difenoconazole 25 EC @ 0.6 ml l-1 with PDI of 41.33% was followed by Mancozeb 75 WG @ 2.5 g l-1 with PDI of 43.33% as compared to control (65.33 %). Maximum disease control was recorded in Tebuconazol 25 EC @ 1 ml l-1 with PDC of 56.12% which was followed by Azoxystrobin 23SC @ 1ml l-1 with 52.04%, Difenoconazole 25EC @ 0.6 ml l-1 with 36.74%. Maximum bulb yield (145.8 q ha-1) was recorded in Tebuconazol 25 EC @ 1 ml l-1 which was statistically at par with Azoxystrobin 23 SC @ 1ml l-1 with 143.3 q ha-1. The minimum bulb yield of 76.1 q ha-1 was recorded in control plot. The increase in bulb yield in Tebuconazol 25 EC @ 1 ml l-1 was 91.59 % over the control. Tebuconazol 25 EC @ 1 ml l-1 recorded the maximum B:C ratio (3.22) followed by Azoxystrobin 23 SC @ 1ml l-1 with 3.14.
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