Loading...
Theses
Browse
1 results
Search Results
ThesisItem Open Access Effect of pre-harvest application of ethephon and potassium sulphate on ripening and quality of winter season guava(CCSHAU, 2018) Bhat, Navya Vishweshwar; Baloda, SatpalThe investigation entitled “Effect of pre-harvest application of ethephon and potassium sulphate on ripening and quality of winter season guava” was carried out at esearch Orchard of Department of Horticulture, Chaudhary Charan Singh Haryana Agricultural University, Hisar during the year 2017-18. Twenty seven uniform trees of each varieties of guava i.e., Hisar Safeda, Hisar Surkha and Lucknow-49 were selected randomly and sprayed with ethephon (200, 400, 600 and 800 ppm) and potassium sulphate (1, 1.5, 2 and 2.5 %) in the last week of November. Maximum increase in yield parameters i.e. number of fruits per tree, fruit weight, volume, length and breadth and total yield per tree was recorded in the fruits harvested from the trees treated with potassium sulphate @ 2.5 per cent however, Lucknow-49 had maximum yield attributing characters compared to other cultivars. Pre-harvest application of different chemicals significantly influenced the quality parameters except seed numbers, weight of 100 seeds, seed weight per fruit and non-reducing sugar. Number of days for ripening and fruit firmness was recorded minimum under the spray of ethephon @ 800 ppm, however Hisar Surkha recorded minimum number of days for ripening and fruit firmness among all the three cultivars. Fruit colour was improved with the treatment of chemicals over the control. Maximum organoleptic rating, pulp weight per fruit, TSS, acidity, TSS: Acid ratio, ascorbic acid, total sugars, reducing sugars and pectin content was recorded under the treatment of potassium sulphate @ 2.5 per cent, however among the cultivars, Lucknow-49 found superior. Minimum Physiological loss in weight, spoilage and maximum marketable fruits was recorded under potassium sulphate @ 1 per cent.