The author tried the long tube culture of Fusarium niveum, to see the total Iength of the mycelial growth of this fungus during one summer season. Culture tubes used were about one meter long and ten to fourteen millimeter in diameter After injecting the culture medium written below into these tubes, they were sterilized and placed horizontally for coagulation. Then each of them was inoculated with the fungus in question, at one side of the coagulated medium. After this, mycelial growth, maximum and minimum temperature were recorded everyday. To compare this with some pathogenic fungi of local necrotic diseases, Valsa mali and Sclerotinia libertiana were chosen. The culture medium used consisted of the followings, onion decoction 100.00 cc KH2PO4 1.00 gr, MgSO4, 0.50 gr, grape sugar 20.00 gr, agar 20.00 gr, water 900.00 cc. It was found to be one of the most excellent media for the mycelial growth of this fungus.
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