Abstract
Inactivation of Agrobacterium tumefaciens was evaluated on the inoculated fresh Radix Ginseng by electron beam irradiation or aqueous chlorine dioxide () treatment. Two groups of fresh ginsengs were prepared and inoculated with A. tumefaciens. One group was then irradiated at 0, 2, and 4 kGy using an electron beam accelerator, and the other group was treated with 0, 50, and 100 ppm of aqueous . Microbiological data indicated that populations of A. tumefaciens significantly decreased with increasing irradiation dose or aqueous concentration. In particular, A. tumefaciens was eliminated by irradiation at 4 kGy, and 100 ppm treatment reduced the populations of A. tumefaciens by 1.44 log CFU/g. These results suggest that electron beam irradiation or aqueous treatment can be useful in improving the microbial safety of fresh ginsengs during storage.
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