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1. Pieces of infected tea root of white root rot were dipped in water solutions of thiophanate-methyl (Topsin-M, ingredient 70%) and benomyl (Benlate, ingredient 50%) for 24 hr. Mycelium growth of the causal fungus from treated roots was nearly inhibited at concentrations higher than 1 : 5000 dilution in both fungicides. 2. Water solutions of Topsin-M (diluted 1 : 700) and Benlate (diluted 1:1000) were irrigated into soil at the rate of 40 ?? /m2 and throughoutly mixed. Mycelium growth from infected roots collected from the treated soils was reduced to the same degree as chloropicrin treatment which was set up as the control. 3. Infected young plants of tea were dipped in the 2 fungicides (the same solutions stated in 2) for 24 hr and replanted. After 6 or 12 monthes, it was found that the dipping treatment markedly inhibited the development of rhizomorpha of the causal fungus around the root. 4. From the results of these experiments, it was concluded that the soil treatment of these 2 fungicides and dipping infected plant in the solutions of them were both effective for control of the disease.