81006472

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ヤクヨウ サフラン ノ キュウケイ フハイビョウ ニ カンスル ケンキュウ ダイ2ホウ フハイビョウキン ニ タイスル TRICHODERMAキン ノ キッコウ サヨウ ニツイテ

Studies on the Corm Rots of C rocussativus L. (II) : On the antagonistic action of Trichoderma fungi against the causal fungi of corm rots

Japanese (日本語)

兵庫農科大學研究報告. 農学編

1(2)

123-128

兵庫農科大学

1954-12

2014-06-04

The antagonistic action of Trichoderma fungi aginst the pathogenic fungi of crocus corms was studied in mixed culture on onion decoction agar plate. Twenty cultural strains of Trichoderma fungi as antagonist isolated from such samples as the sapwood or bark of various timbers, broad bean stems, crocus corms, wheat brans, and the sporophores of Armillaria mellea, and three pathogenic fungi, i. e. Sclerotinia gladioli, Sclerotium sp., and Botrytis sp., isolated from the diseased corms of crocus were used in the present experiments. (Table 1-2). In mixed culture, although the mycelial growth of all the pathogenic fungi mentioned above was stopped by mean of contacting with the mycelium of Trichoderma fungi, almost all the strains of Trichoderma fungi grew continuously, and extended into the colonies of the former. The mycelial growth of Trichoderma fungi in the colonies of the pathogenic fungi somewhat varied with the strain. All the strains except Nos. 3 and 10 grew fairly well in the colonies of Sclerotina gladioli, abundantly produced their conidia over the colonies, and destroied almost the mycelium of the colonies in 7 days after inoculation. All the strains except No. 1 (in the case of Scleroium sp.) or No.9 (in the case of Botrytis sp.) of Trichoderma fungi grew fairly well in the colonies of Sclerotium sp. as well as Botrytis sp., extended almost into the whole part of the colonies in 14 days after inoculation, and destroied the mycelial colonies of them. (Table 3-5).

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