Effect of Plant Growth Regulators and Fungicides on Pre-Harvest Fruit Drop in Nagpur Mandarin

Fruits retained on each tree under study were counted prior to first application of spray. Fruit dropped were counted at weekly interval. Minimum pre-harvest fruit drop (11.07 %) was found with the application of T5 (2, 4-D 10 ppm + Carbendazim 0.1 %). Retention per cent of fruits was found to be maximum (88.93 %) was observed with T5 (2,4-D 10 ppm + Carbendazim 0.1%). Fruit yield in respect of number of fruits per tree and weight of fruits per tree were found significantly maximum (1058.88 fruits/tree and 159.15 kg respectively) with the spray of T5 (2, 4-D 10 ppm + Carbendazim 0.1%) which was superior to all other treatments.