Onion bulbs of unirradiated and irradiated with 4.2 and 8.1 Krad by 60Co gamma rays were stored at 4° and 10°C for five months, and the relationship between the sprouting and the amounts of di-n-propyl disulfide (DPDS) developed from the sliced onions was investigated. The amount of DPDS increased apparently along with the sprouting. The sprout inhibition with the irradiation was appeared to suppress the development of DPDS.
