The present study was made to evaluate the Influence of plant growth regulators and mineral nutrients on yield and physico-chemical characteristics of litchi cv ‘Rose Scented’. The results clearly indicated that application of micro-nutrients was beneficial in improving the fruit yield which was observed maximum under the trees treated with 1.0 per cent borax. Maximum edible percentage and minimum non-edible percentage in fruits was observed in treatment with 400 ppm SADH. Trees sprayed with 1.5 per cent potassium nitrate and 2.0 per cent calcium nitrate gave the highest fruit weight of 20.41 and 20.37 g, respectively. TSS, Ascorbic acid content, Total sugar, Juice percentage was found to be significantly higher by the sprays of borax at 1.0 per cent. Acidity was also lowest with the application of borax 1.0 per cent. Although the application of two sprays of the aqueous solution of 1.0 per cent borax technically proved to be most effective in improving yield and quality of fruits over control significantly, yet the most economic treatment proved to be the spraying of 0.5 per cent borax on litchi trees at 15 day interval during the period of growth and development of fruits.
