Postharvest loss assessment in yambean and ginger at various handling points
1994
Salda, V.B. (Benguet State Univ., La Trinidad, Benguet (Philippines). Northern Philippines Root Crop Research and Training Center)
Loss assessment at various handling points were conducted to quantify and identify causes of losses in yambean and ginger. This study was done in Mangaldan, Pangasinan [Philippines], and Dupax del Sur, Nueva Viscaya [Philippines]. These were transported to La Trinidad, Benguet for further assessment. In yambean harvest losses were mainly due to mechanical injuries, very small-sized tubers and slight to moderate skinning observed during bulk transport. In retailing weight loss ranged from 3 percent to 6 percent for 7 to 14 days holding in the local market. The loss assessment in ginger indicate immediate need for integrating appropriate production, crop protection, and postproduction management systems. Postharvest losses are high ranging from 5 percent to 100 percent. At harvest, the highest losses are primarily due to diseased roots. Percentage disease infection differed from one farm to another. Mechanical injuries and bruises are moderate attributed to poor harvesting, transporting techniques and poor roads, washing slightly contributed to mechanical breakages of rhizomes but improved the appearance. Losses during retailing is not much recognized for the reason that retailers have ways of including the undesirable roots during packing in plastic containers. Percentage decay in storage was high (100 percent) in the selected roots obtained from infected farm; the lowest was 2 percent. Other causes of storage losses included weight loss, shriveling, and sprouting
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