Effect of harvesting method and package type on quality and shelf-life of mango fruits

Mohamed Magzoub Elzubeir, Abu-Bakr Ali Abu-Goukh, Osman Adam Osman

Abstract


The traditional method of harvest and package type were compared with an improved harvesting technique and packaging in standard export carton boxes and evaluated according to quality and shelf-life of 'Kitchner' and 'Abu-Samaka' mango fruits in 'Abu-Gebeha' area during 2012/2013 season. The fruits harvested by the traditional method were snapped by a hook attached to a long bamboo pole, the fruits dropped to the ground and then picked into carton boxes. In the improved method of harvest, the fruits were picked by a hook attached to a long bamboo pole equipped with a long cloth sleeve held open by a metal ring. When the pedicle was severed, the fruit dropped into the sleeve, moved smoothly downwards to be received from the open-end by the picker and packed into the carton boxes. Two types of packages were used. The traditional packages were carton boxes 27 x 27 x 42cm, and the improved packages were standard export boxes 43 x 33 x 15 cm. The treatments were (1) traditional harvest and traditional packages (control), (2) traditional harvest and improved packages, and (3) improved harvest and improved packages. The treatments were arranged in a completely randomized design with four replicates and stored at 18±1oC and 85- 90% relative humidity. The improved method of harvest and improved packages significantly delayed the onset of the climacteric peak, reduced respiration rate, weight loss, fruit softening, peel color development, total soluble solids (TSS) accumulation and titratable acidity changes, retained ascorbic acid, maintained fruit quality and extended the shelf-life of mango fruits. Initial respiration rate was decreased by 14.9% and 24.6%, weight loss was reduced by 13.8% and 28.9% and ascorbic acid was more by 28.6% and 75.5% in the improved harvesting method and improved packages, compared with the control in 'Kitchner' and 'Abu-Samaka' mangoes,

 

respectively. At the end of the storage period, 48 % of the fruits were in the 'very good' quality grade and 22% in the 'good' grade in fruits harvested by the improved method and packed in improved packages, compared with 18.5% in the 'very good' quality grade and 20% in the 'good' grade in fruits harvested traditionally and packed in traditional packages. On the other hand, only 9.0% of the fruits were 'unmarketable' and 9.5% were 'poor' in quality in fruits harvested by the improved method and packed in improved packages, compared with 25%' unmarketable' and 20% in the 'poor' quality grade in the control fruits.


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