Effect of Aloe vera gel and Guava Leaf Extract Coating on Postharvest Quality of Mango (Mangifera indica) L. cv. “Nam Dok Mai Sri Tong”
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Abstract
Mango cv. Nam Dok Mai Sri Tong (NDMST) is an important export fruit item for Thailand. A problem with mango fruit is the rapid quality decline after harvest, which creates troubles for the storage and export of the fruit. Moreover, this problem is particularly significant in the case of the NDMST variety. In this research, we aimed to test the impact of coating the NDMST mango fruit with different concentrations of Aloe vera (0%, 30%, and 60% (W/V)), and guava leaf extract (0%, 30%, and 60% (W/V)), a mixture of 15% A. vera and 15% guava leaf extract, and a mixture of 30% A. vera and 30% guava leaf extract on the extension of storage life at ambient temperature (30±2)ºC and relative humidity (65±2%). Weight loss, firmness, titratable acidity, total soluble solids, pH value, ascorbic acid, color and sensory evaluation were evaluated in comparison with untreated control. The results showed that coating with A. vera solution (60%) and the mixed solution of A. vera 30% + guava leaf extract 30% delayed colour change, reduced weight loss, ascorbic acid level, and change in firmness, and extended consumer acceptance of shelf life to 8 days compared to 4 days for the control (P<0.05). Therefore, application of these coatings is an alternative choice for the postharvest handling, storage and export of organically grown fruit such as NDMST mangoes in the future.
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King Mongkut's Agricultural Journal
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