A study was conducted in the postharvest laboratory of the Federal College of Horticulture Dadinkowa, Gombe State, Nigeria, to investigate the effects of some postharvest treatments, namely; hot water treatment, gibberellic acid, ground nut oil, extracts of garlic, extracts of neem leaves, mixture of extracts of neem leaves and garlic and distilled water (control) on the storage quality of mango fruits. The experiment was laid out in a complete randomized design (CRD) replicated three times. The results indicated that all the treatments reduced weight loss, fruit diameter, fruit decay and loss in firmness. However, gibberellic acid was found to be most effective in minimizing fruit weight loss and fruit diameter when compared with other treatments. In terms of fruit decay and fruit firmness however, mixture of extracts of neem leaves and garlic (500 ml each) performed better than all other treatments throughout the storage period of 15 days. Hence, it can be concluded that application of gibberellic acid and extracts of neem leaves and garlic enhances the shelf life of mango fruits, and can maintain good fruit quality under ambient condition for up to 15 days.
Some Physical and Frictional Properties of Dikanut (Irvingia Wombolu) As a Function of Moisture Content. (Published)
Some physical and frictional properties of Dikanut (Irvingia wombolu) were evaluated as a function of moisture content varying from 7.02% to 15.04% (dry basis). Regression models were equally developed to these effects. All properties studied were found to have a polynomial response to moisture content increase within the moisture content range studied (7.02% to 15.04% dry basis). The kernel dimensions increased from 44.00 to 47.73mm, 33.50 to 34.89mm, 20.60 to 21.79mm and 32.20 to 33.73mm for major, intermediate, minor and equivalent diameters respectively as moisture content increased. The kernel volume and surface area increased from 120.01mm3 to 158.56mm3 and 102.04mm2 to 131.64mm2. Bulk density and true density increased from 3.64g/cm3 to 4.33g/cm3, and 10.31g/cm3 to 12.26g/cm3 respectively with increase in the moisture content range tested. Aspect ratio and sphericity and porosity increased from 0.74 to 0.79; 0.70 to 0.72; 0.41 to 0.60 respectively within the moisture content range studied. Angle of repose increased from 20.10 ̊ to 37.20 ̊ while static coefficient of friction increased from 0.60 to 0.92 (plywood), 0.50 to 0.82 (mild steel), 0.37 to 0.70 (aluminum), 0.30 to 0.64 (plastic) as moisture content increased from 7.02 to 15.04% (dry basis) with plywood giving the highest range of values. The relevant data obtained for this variety would be useful for design and development of machines and equipment for processing and handling operations.