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 |
In Vadavathur village, small onion is cultivated in two main seasons viz., Early kharif and Rabi in an area of 425 ha with a productivity of 14 tonnes / ha. Small onion is mainly affected by dew drops during the month of November to January, where the minimum temperature falls between 12 to 140C for 17 days and caused tip drying. Presence of dew drops in tip of onion leaf sheath for a long time may lead to death of terminal leaf tissue resulted in tip drying and also reduction in yield of 0.7 to 2 tonnes / ha. The tip drying of small onion due to dew drops was controlled in Vadavathur village under NICRA scheme by three methods viz., spraying of water through mobile sprinkler (T3) and by using rope method (T2) and without spray (T1). In rope method, the nylon rope was pared over the onion crop during early morning by two labourers for 2 hours / 0.4 ha area in 3 days interval. In mobile sprinkler method, Sprinkler sprinkle the water with a discharge rate of 200 LPM over the onion crop for 1 hour covered in an area of 0.4 ha on cost basis @ Rs.150/ hour in weekly intervals. By these method the dew drops present on the tip of onion leaves got fall down and washed out. Demonstration plots recorded higher yield of 13.0 t/ha compared to farmers practice of 12.3 t/ha with a B: C ratio of 3.17 and 2.31 respectively. Mobile sprinkler method as one of the climate resilience practice followed against tip drying in small onion due to dew drops in NICRA village of Namakkal district, which effectively protect the crop during adverse weather condition and also improved the quality of onion bulbs.
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