Further studies on chemical induction of flowering directly on fruited shoots in off phase Alphonso mango trees.
Rao M. M., Srihari D., Patil V. S., Madalageri M. B.
Author Affiliation: Department of Horticulture, University of Agricultural Sciences, Dharwad - 590 005, India.
Karnataka Journal of Agricultural Sciences 10 : 598-601
Abstract : With a view to managing the problem of biennial bearing, 40-year-old trees of mango cv. Alphonso were given a water spray (control), 4 sprays of ethrel [ethephon] (200 ppm) or 2 sprays of paclobutrazol (2000 or 3000 ppm), TIBA (100 or 200 ppm), CCC [chlormequat] (1000 or 1500 ppm) or mapiquot chloride [mepiquat chloride] (500 or 1000 ppm) during the critical period of fruit bud differentiation (October-November) following an on-year at Dharwad, India. All treatments promoted flowering directly on fruiting shoots, especially paclobutrazol at 2000 ppm and TIBA at 100 ppm, which resulted in 62.0 and 51.3% flowering, respectively, compared with only 5% in the control treatment. Some of the fruiting shoots developed vegetative shoots which also flowered in a few cases. Yields in the paclobutrazol (2000 ppm) and TIBA (100 ppm) treatments were 55 and 48.4%, respectively, of the yields in the preceding on-year.