水生菌科の數種及 Pythium 屬菌の稻苗に對する病原性比較研究
スポンサーリンク
概要
- 論文の詳細を見る
The rot-disease of seedlings in nursery-beds is one of the most serious diseases of the rice plant in Japan. This disease had been recognized by some investigators to be caused by a water mould, Achlya, prolifera (NEES) DEBARY (Achlya prolifera NEES). However, in 1931 and 1933, Ito and his coworkers reported that the disease is caused by some species of Saprolegmaceae, Pythiomorpha and Pythium. The present paper deals with the results of the writer's inoculation experimuents of some aquatic fungi on rice seedling, in which seven species belonging to Saprolegniaceae and nine species of Pythium were used. The names of these sixteen fungi, which were isolated by the writer from water in Kyoto, are as follows : Saprolegnia Thureti DEBARY, S. mixta, DEBARY, S. monoica, PRINGSH. var. glomerata TIESENHAUSEN, Achlya racemosa HILDEBRAND, A. imperfecta COKFR, A. Oryzae ITO et NAGAI, Aphanomyces helicoides V. MINDEN, Pythium tenue GOBI P. angustatum SPARROW, P. torulosum COKER et PATTERSON, P. aphanidermatum (EDSON) FITZPATRICK, P. helicum Ito, P. proliferum DEBARY, P. marsipium DRECHSLER, P. polypapillatum ITO, and P. pleroticum ITO. The writer's inoculation experiments were carried out using the seedlings grown on SACHS' solution containing 2 % agar or the sterilized field soil covered with water. In the experiments each fungus to be tested were inoculated on the seedsas soon as they were sown. The pathogenicity of Pythium aphanidermatum and P. helicum, was extremely strong and that of the other seven species of Pythium seemed to be moderate, but all the species tested, which belong to Stprolegniaceae, showed a very weak pathogenicity. The pathogenicity of these aquatic fungi was suggested to be more destructive when the rice plants were cultivated at lower temperatures. Judging from the writer's experiments Pythium species seem to be more important than the fungi belonging to Saprolegniaceae as the causal organisms of the rot-disease of rice-seedlings.
- 日本植物病理学会の論文
- 1943-01-15
著者
関連論文
- 數種芳香族水銀化合物の構造と稻籾殺菌效力 (發表豫定の研究要録)
- 水生菌科の數種及 Pythium 屬菌の稻苗に對する病原性比較研究
- 稻胡麻葉枯病菌の發育と分生胞子形成に及ぼす NO_3 窒素の影響 (講演要旨)
- 京都産水生菌の種類とその稻に對する病原性の研究