Pre-Flowering Sprays of Zinc and Boron Influenced Panicle Emergence and Panicle Growth of Amrapali Mango

The present investigation was conducted at the instructional farm of Rathindra Krishi Vigyan Kendra under Palli Siksha Bhavana (Institute of Agriculture), Visva Bharati University, Sriniketan which comes under in humid sub-tropical region of West Bengal during the year 2015-16 and 2016-17 to investigate the influence of pre-flowering sprays of zinc and boron on panicle emergence and panicle growth of Amrapali mango. The present study included nine treatment combinations of sprays of zinc sulphate and borax at pre flowering stage replicated three times as T1: Control (distilled water), T2: ZnSO4 @ 0.5%, T3: ZnSO4 @ 1.0%, T4: Borax @ 0.5%, T5: Borax @ 1.0%, T6: ZnSO4 @ 0.5% + Borax @ 0.5%, T7: ZnSO4 @ 0.5% + Borax @ 1.0%, T8: ZnSO4 @ 1.0% + Borax @ 0.5% and T9: ZnSO4 @ 1.0% + Borax @ 1.0% in Randomized Block Design (RBD). The sprays were done in three cycles at 15 days interval starting from end of the November, keeping 3 days gap between zinc sulphate and borax spray in combination treatments. Minimum days to panicle emergence and flowering, maximum panicle length and different types of branches panicle-1 were recorded under ZnSO4 @ 1.0% + Borax @ 0.5% spray. In conclusion, ZnSO4 @ 1.0% + Borax @ 0.5% treatment can be used as pre flowering spray for early flowering with better growth of panicles of mango (cv. Amrapali).