Efficacy of plant growth regulators and mineral nutrients on fruit drop and quality attributes of plum cv. Satluj purple
2021
Kaur, Arashpreet | Kaur, Nirmaljit | Singh, Harminder | Murria, Sarah | Jawanda, S. K.
Fruit drop is a major physiological disorder limiting the productivity of plum fruit. The present study was conducted to test the efficacy of foliar application of different concentrations of plant growth regulators (NAA, Salicylic acid, 2,4-D) and CaNO₃ on management of fruit drop with improvement of fruit quality parameters of Plum (Prunus salicina) cv. Satluj Purple. The foliar spray application was done twice, first ten days after the pit hardening stage, and the second ten days after the first application. Among the different treatments, 0.15 mM SA reduced fruit drop significantly and translated into highest fruit yield, higher content of ascorbic acid, total and reducing sugar content. The reduced activity of cell wall degrading enzymes cellulase, polygalactouranase and glucanase in the fruit pedicels registered with 0.15 mM SA suggest their significant role in reducing fruit drop. Hence, two foliar applications of 0.15 mM SA are beneficial for reducing fruit drop and improvement of fruit quality in plum cv. Satluj purple.
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