Effects of Inflorescence Removal on Delayed Harvesting of ‘Namdokmai Sithong’ Mango Fruit Production
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Abstract
'Namdokmai Sithong' mango is an important commercial fruit in Thailand. Delayed harvest mango can get high prices. The objective of this experiment was to study effects of inflorescence removal on delayed harvesting of ‘Namdokmai Sithong’ mango production. The experimental design was randomized complete block design (RCBD) with 3 treatments, i.e. 1) inflorescence not removed (control) 2) removal of inflorescence at 50% bloom, and 3) removal of inflorescence at 100% bloom. There were five blocks (rows). Changes of shoots, new inflorescence, inflorescence size, fruit set, fruit weight, peel color, flesh color, fruit firmness, total soluble solids (TSS), titratable acidity (TA), vitamin C, carotenoid content, and total phenolic compound were recorded. The results showed that during the 2nd - 4th week after experiment, mango trees with removed inflorescence started developing new inflorescences. At the 6th week after inflorescence removal, mango trees which inflorescence were removed at 50 and 100% bloom showed 52.5% and 33.0% new inflorescences, respectively. Fruit set until fruit bagging stage were 3.1% and 3.3% of studied shoot, respectively, which were less than in control plants (48.5%). Mango fruits from plants with removed inflorescence could be harvested 3 weeks after control plant. Moreover, fruits from plants with removed inflorescences were larger than those in the control treatment. These results indicate that inflorescence removal resulted in very low new set of yield. However, it can be used to develop the methods for delayed harvest mango production to reduce market competition with on season fruit.
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