THE EFFECT OF DATE OF HARVEST ON SHELF LIFE OF ONIONS STORED BY HANGING FROM LEAVES
Onions are traditionally stored in Thailand by hanging bunches, tied together by their leaves, on horizontal bamboo poles. Harvesting is frequently conducted at an early stage of maturation due to various logistical and economic pressures. This investigation was conducted to examine the effect this practice has on the shelf life of the onions. Bulbs were collected from a commercial field near Fang, Thailand, on three dates: at commercial harvest time, and one and three weeks later. The commercial harvest occurred when there were less than 10% fallen tops. The onion variety used was the F1 hybrid RAM-710, a long-storing, short-day variety. On the last date, the common variety of the area, hybrid Granex 33, was collected with approximately 10% fallen tops. The onions were tied in bunches and hung in a commercial storage shed using the common storage system. Ten replications from each of the four plots in the commercial field were prepared on each harvest date. The number of onions lost to falling, rotting, and sprouting were counted at monthly intervals, starting 1 month after the last harvest and concluded 4 months after the last harvest. Losses were evaluated by number of bulbs and weight. The last harvest date was clearly superior in shelf life. RAM-710 stored significantly better than Granex 33.
Peters, R.J., Kowithayakorn, T., Chalard, T. and Rabinowitch, H.D. (1994). THE EFFECT OF DATE OF HARVEST ON SHELF LIFE OF ONIONS STORED BY HANGING FROM LEAVES. Acta Hortic. 358, 365-368