Increase of Perfect Flower and Fruit Set in Mango cv. Kaew by Using Foliar Fertilizer

Abstract

            Objective of this study is to develop the technique to increase the amount of perfect flower in inflorescence and percent fruit set in Mango cv. Kaew. Two foliar fertilizers; monopotassium phosphate at the concentration of 0, 1.25 and 5% and potassium nitrate at 0, 1 and 7.5% were compared, when similarly sprayed three times at 5 days interval. Three different developmental stages of inflorescence were also compared for their response to the used fertilizers, namely at bud stage, at 5-10 cm length and at about 20 cm length.

            The results revealed that both foliar fertilizers could increase final inflorescence length, number of inflorescence branch, total flower number of each cluster, total number of perfect flower and also percentage fruit set. Potassium nitrate at the concentration of 1% gave the best result in all mentioned parameters and for all the three developmental stages of inflorescence. No toxicity was also observed on leaves and flower clusters after sprayed with this fertilizer