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Gamma irradiation (12 Krad) was more effective than preharvest application of maleic hydrazide (2500 ppm) in controlling sprouting and extending the storage life of garlic bulbs. Gamma irradiation decreased the length and thickness of internal sprouts and entirely prevented chlorophyll formation in sprouts; it decreased external discoloration and disease to a greater extent than did maleic hydrazide treatment. Both treated and untreated bulbs held in cold storage (0°C; 90-95% RH) showed a longer storage life than did those held in common storage (15-30°C; 50-75% RH). Gamma irradiation, maleic hydrazide treatment, and cold storage reduced weight loss and delayed emaciation.

Growth-regulating substances have been used extensively on horticultural crops to increase fruit set and prevent fruit drop. Several investigators have observed that preharvest application of growth regulators such as 2,4,5-trichlorophenoxyacetic acid may affect fruit maturity and ripening (Stewart, 4). This raised the question about the effects of the postharvest treatment of fruits with grbwth regulators.