A severe ginseng root rot disease was occurred and became widespraed in 1973 affecting the ginseng cultivating plot around Kangwha and Gimpo-Gun of Kyunggi province. Soil samples were collected from the area of Wolgot-Myun, Gimpo-Gun, Kuunggi-Do, 1974.
We examined general fungi and Fusarium sp. in soil layers and also in different kinds of soil of respective diseased, uncultivated and healthy areas, and found the following results.
1. In the diseased and uncultivated area, the content of moisture, organic matter arid silt was greater than in the healthy area.
2. Contray to the above, the healthy area contained a greater amount of inorganic elements such as P₂O_5, K,Ca and of soil particle such as C₃ and F₃. The degree of pH and content of Mg were even in the three types of soils.
3. General fungi were found in abundance in the diseased and uncultivated soils. It was observed that in all types of areas, general fungi reside in abundance in the rhizosphere, i.e., 10-15 ㎝ layers and that the closer the surface, the greater the numbers of fungi.
4, A great number of Fusarium sp. was found in the uncultivated area, and followed diseased ana healthy area. It was observed that in all types of areas, Fusarium sp. distributed in abundance in rhizosphere and that the closer the surface, the greater the numbers of Fusarium sp., with the numbers decreasing as the soil layers increase.
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