Effect of Girdling on Bio-chemicals Parameters in Plum cv. Kala Amritsari

Experiment was with the objective to improve the fruit quality through girdling in sub-tropical (low chilling requiring) plum cv. Kala Amritsari during 2022 and 2023 at CCS HAU, Hisar. The experiment encompasses of five treatments viz. girdling at full bloom stage (more than 70 % flower anthesis), girdling after fruit set (14 days after petal fall), girdling at pit hardening stage, girdling at 15 days before harvesting and control (un girdled). Among various girdling treatments, girdling at pit hardening stage significantly increased fruits bio-chemical quality (total soluble solids, sugars, anthocyanin content) and decreased acidity, carotenoid content followed by girdling after fruit set over the other remaining girdling treatments. The girdling at full bloom stage was inferior to control (un girdled) in all parameters studied except carotenoid content parameter. Ascorbic acid parameter was non-significant with girdling treatments.