Journal of Taiwan Agricultural Research

Author:Che-Lun Huang, Min-QI Xu, Shu-Fang Lo, and Yung-Chang Lai*

Abstract:

    Three experimental treatments on sprouting and decaying rates of the storages of sweet potato were studied in this research, including spraying sprouting inhibitor Isopropyl-N (3-chorophenyl) (CIPC) to the leaves at two weeks before harvest, dipping storage roots in CIPC solutions after harvest, and exposure of storage roots to different intensities of Co60 after harvest. The treated roots were stored at room temperature or 15℃, 90% RH for 6 wk before investigating their sprouting and decaying rates. Results showed that the sprouting inhibitor CIPC spraying on the leaves of storage roots would not inhibit the sprouting of sweet potato. However, the sprouting of the storage roots stored at 15℃ and 90% RH were inhibited substantially. The storage roots produced from a healthy field management practice showed little disease and insect infections, and the rates of disease-infected roots were lower during storage. For storage roots exposed to 500 GY of Co60, the sprouting rate was zero for ‘TNG 57? stored at room temperature for 30 d as well as for ‘TNG 66? stored at room temperature for 60 d, and the sprouting rate was 10% for both cultivars stored for 90 d. Overall, treatment of 500 GY of Co60 effectively inhibited the sprouting of storage roots of sweet potato, and storage time may be extended up to 90 d.

Key words:Sweet potato, Sprout inhibitor, CIPC, Co60 exposure, Storage

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