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 |
Sathgudi cultivar of sweet orange is very popular in Andhra Pradesh and it is successfully grown in Rayalaseema region (Red and loamy soils) of Andhra Pradesh. In certain scarce rainfall regions of Andhra Pradesh, Ambe bahar flower initiation in sweet orange occurs late in February and extended up to first fortnight of March resulting poor fruit growth, leading to low economic fruit yields. To enhance the fruit growth and yields rapidly, an investigation was made in farmers orchard at two locations in YSR District with combined spays of growth regulators and macronutrients, consisting of 9 treatments viz., 2,4-dichlorophenoxy acetic acid (2,4-D) and GA3 at 10ppm combined with two different concentrations of urea and monopotassium phosphate at 1 and 1.5 % and water spray (control) at different stages of fruit development. Two consecutive years (2017-18 and 2018-19) of study indicated that pre harvest spray of urea @ 1.5 % along with 2,4-D 10 ppm or GA3 10 ppm, one month before harvest enhances sweet orange fruit yield by 40 % and 39.76% respectively, as compared to control. The fruit weight was significantly improved due to application of plant growth regulators but not the fruit quality like TSS and acidity.
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