Effect of growth regulators on flowering, fruit set and fruit retention in mango.
Birendra Prasad, Ray R. N., Prasad K. K., Chowdhary B. M., Brahmachari V. S.
Author Affiliation: Department of Horticulture, Birsa Agricultural University, Ranchi - 834 006 (Jharkhand), India.
Journal of Research, Birsa Agricultural University 18 : 257-260
Abstract : An experiment was conducted at the Ranchi Agricultural College, Kanke, Jharkhand, India, during 2002-03 and 2003-04 to find out the effect of foliar spraying of growth regulators on the flowering, fruit set and fruit retention of mango cv. Amrapali. Treatments comprised: NAA at 10, 20, 30 and 40 ppm; 2,4-D at 10, 20, 30 and 40 ppm; 2,4,5-T at 20, 40, 60 and 80 ppm; GA3 at 50, 100, 150 and 200 ppm; and two controls (water spray and unsprayed). Among all treatments, 20 ppm NAA recorded the earliest panicle emergence, and date of first and 50% flowering, the least sex ratio, the highest duration of panicle emergence and the highest percentage of flowering shoots. Fruit set and retention were most enhanced by the application of 100 ppm GA3.