Potassium nitrate-induced flowering of 'Carabao' mango shoots at different stages of maturity.
Astudillo E. O., Bondad N. D.
Author Affiliation: UPLB, College, Laguna, Philippines.
Philippine Journal of Crop Science 3 : 147-152
Abstract : When newly emerging Carabao mango shoots were tagged on April 1 and sprayed on one of a series of dates between August and December with potassium nitrate (KNO3) at 10-40 g/l, flowering was induced. The oldest shoots (8.5 months) required only 10 g KNO3/l to produce the best flowering response but shoots which were younger when sprayed (4.5-7.5 months) were most responsive to 20 g/l. At all stages of maturity 40 g KNO3/l reduced the flowering percentage, panicle length, number of flowers, primary panicle branches and sex ratio. Heavy rain and a typhoon delayed flowering. No untreated shoots flowered.