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 |
Effect of silicon on incidence and severity of purple blotch disease in onion was assessed by conducting field experiments at College of Horticulture Bengaluru. Silicon treatments significantly reduced the disease incidence and severity in two varieties (Bellary Red -Highly susceptible and Arka Kalyan - moderately resistant) of onion taken for the study. In both the varieties, least incidence and severity of disease was recorded in treatment receiving two sprays of silicic acid @ 4 ml L-1 which was superior to standard check (3 sprays of mancozeb @ 0.25 %) or other treatments followed by soil application of silicon @ 300 kg ha-1 . Silicic acid spray @ 4 ml L-1 reduced the disease incidence and severity by 34.88 and 28.93 per cent respectively in Bellary Red variety and it was reduced by 44.32 and 45.72 per cent respectively over untreated control in Arka Kalyan variety. Further, average bulb weight (Arka Kalyan- 58.33 g, Bellary Red -63.40 g) and total bulb yield (Arka Kalyan- 31.61 t ha-1, Bellary Red- 37.46 t ha-1) were also significantly higher with foliar application of silicic acid @ 4 ml L-1 in both the varieties over all other treatments. Hence, silicon application could be used as one of the ecofriendly strategies of purple blotch disease management in onion.
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