日本植物病理学会報
Online ISSN : 1882-0484
Print ISSN : 0031-9473
ISSN-L : 0031-9473
16 巻 , 3-4 号
選択された号の論文の16件中1~16を表示しています
  • 大谷 吉雄
    1952 年 16 巻 3-4 号 p. 97-102
    発行日: 1952年
    公開日: 2009/04/21
    ジャーナル フリー
    In this paper, the results of inoculation experiments with blast fungus on the rice plant and the chemical analysis of the plants are described; the relation between the susceptibility of the plant to blast disease and its chemical components is also discussed. Throughout all the experiments, a rice variety "Eiko" was used.
    Inoculatin experiments using water-cultured rice plants, grown with various amounts of nitrogen, indicate that the plants supplied with the larger amounts of nitrogen are apt to be the more severely attacked by the blast fungus, producing more numerous and larger lesions. And it is found by chemical analysis that the plants given the more nitrogen contain the more α-amino nitrogen; this fact is especially conspicuous in the plants supplied four-fold and five-fold amounts of standard nitrogen. Potted rice-plants were inoculated with the blast fungus before and after the top dressing, and, parallel to the experiment, the plants remained uninoculated were chemically analyzed. It is found that the plants come gradually to be more severely attacked by the fungus within two days after the top dressing than they were before, and the plants treated with top dressing become gradually more rich in α-amino nitrogen and amide nitrogen after two days following the top dressing.
    The above described experiments seem to show that the amount of soluble organic nitrogenous components such as α-amino acid and amide, is connected with the susceptibility of rice-plant to blast disease.
    According to the present author's previous report the seedlings raised in hot bed nursery cotain much more soluble protein nitrogen, α-amino nitrogen and basic nitrogen in comparison with those raised in the ordinary nursery; the former are apt to be more severly attacked by blast fungus.
    Both at the ear-formation stage and the boot stage the leaves of rice plant contain more soluble organic nitrogen than the leaves at the other growing stages while they are apt to be seriously attacked by the fungus at the stages mentioned above. No relation between the susceptibility of rice plant to blast disease and the sugar content of rice plant is found.
    Using these experimental results the author calculated the correlation coefficient between the size of lesions and the amount of various nitrogenous components. The correlation between the size of the lesions and soluble organic nitrogen, particulary the basic nitrogen and α-amino nitrogen, is perfect. Increase of the above-mentioned nitrogenous components in the rice plant, therefore, may be favorable for the growth of the fungus in its host plant and make such plants more susceptible to the blast disease.
  • 田中 正三, 香月 裕彦, 香月 文子
    1952 年 16 巻 3-4 号 p. 103-106
    発行日: 1952年
    公開日: 2009/04/21
    ジャーナル フリー
    稻熱病菌はイオン撰擇吸收による培地のpH酸性化を防げば窒素榮養源としては不良と考えられていたアンモニヤを良く利用同化することが判明した。又窒素源として硝酸アンモニウムの形であたえると,アンモニヤを優先的に利用し,後に硝酸を吸收する。又硝酸鹽培地では糖の消費に對する窒素の吸收及び經濟係數がアンモニウム培地に比して低いが,これは硝酸の還元の爲に糖が使用される事を意味するものであろう。
  • 鐙谷 大節
    1952 年 16 巻 3-4 号 p. 107-108
    発行日: 1952年
    公開日: 2009/04/21
    ジャーナル フリー
    抵抗性を異にする稻を通過した稻熱病菌の病原性の差は,侵入する時にのみ現われ,侵入して後の伸展は品種別に論じなければならない。
    而して侵入後の伸展割合に差を示す品種と示さない品種を見た事は,この關係が不動のものであるか,又は接種源と各品種との間に特別の關係があるか否かは今後の問題である。
  • 北島 博
    1952 年 16 巻 3-4 号 p. 109-112
    発行日: 1952年
    公開日: 2009/04/21
    ジャーナル フリー
    桃の果實に對する炭疽病菌の侵入については第2報に於て簡單に報告しておいたのであるが,その後の寄主體内に於ける病原菌の行動を追跡して越冬部位である結果枝内に侵入するに至る經過を觀察し,併せて果實以外よりする侵入についても若干の觀察を行なつたのでその結果を報告する。
    實驗には主として罹病性品種であるElberta(20年生)を用い,一部にTuscan及び抵抗性品種である岡山早生,白桃の3年生苗を用いた。
  • 富山 宏平
    1952 年 16 巻 3-4 号 p. 113-116
    発行日: 1952年
    公開日: 2009/04/21
    ジャーナル フリー
    麥の雪害の主要な原因が病原菌であることに就いては既に松尾などにより證明せられた。筆者も高濃度のセレサン撤布試驗により,標準區では殆んど全株が腐敗する場合でも,一葉も損じない状態で雪害を防除し得ることを明かにして,小麥の雪害は病原菌による腐敗であると結論した。從つて雪害の機構の解明は病原菌に對する小麥の抵抗性の知識に基かねばならぬ。ここに述べる所はTyphula屬菌による雪害の機構及びそれに關連する小麥の越冬性を支配する要因に就いての考察である。本研究を遂行するに當り御教示並に御校閲を賜つた北海道大學栃内教授,常に御指導を賜つている北海道農業試驗場病蟲部長田中技官,御教示を賜つた東北大學坂本教授に心から感謝申上げると共に本研究に御助力を賜つた方々に對し深く感謝申上げる次第である。
  • 栃内 吉彦, 澤田 啓司
    1952 年 16 巻 3-4 号 p. 117-120
    発行日: 1952年
    公開日: 2010/03/08
    ジャーナル フリー
    1. 菜豆炭疽病抵抗性の品種間差異を明かにするため本邦一般栽培品種及び外國品種等40數品種の菜豆を用いて,その子苗及び莢に對する接種試驗を行つた。
    2. 實驗には,虎豆・金時兩品種の莢及びビルマの種子等より分離せる4種の菜豆炭疸病菌を用いた。
    3. 子苗に對する接種試驗の結果,これら4系統の菌に對して,金時,手無長鶉,中長鶉等一般栽培品種を始め多數の品種は著しい感受性を示すに對し,手無中長鶉,菊地長鶉,常富長鶉,紅金時,大手亡等は強い抵抗性を示した。
    4. 從來本病に對しては一般に蔓性品種が強く矮性品種が弱いと云われているが,子苗に對する接種試驗の結果より見ると,子苗に於ては蔓性品種にも罹病性のものがあり,矮性品種に抵抗性のもののあることが認められた。
    5. 子苗に對する接種試驗の結果,抵抗性の強弱の明かになつた手無長鶉,金時(弱),手無中長鶉,茶白,紅金時,大手亡(強)の6品種を用いて,莢に對する接種試驗を行つた結果,子苗期に於ける強弱と大體同傾向を示すことが明かになつた。
  • 白濱 賢一, 本橋 精一
    1952 年 16 巻 3-4 号 p. 121-122
    発行日: 1952年
    公開日: 2010/01/12
    ジャーナル フリー
  • 魚住 哲郎, 吉井 甫
    1952 年 16 巻 3-4 号 p. 123-126
    発行日: 1952年
    公開日: 2010/03/08
    ジャーナル フリー
    Erysiphe cichoracearum DC., Sphaerotheca fuliginea (SCHFECT.) POLL., and Sph. humuli (DC.) BURR. are reported as the powdery mildew fungi attacking cucumber and other members of cultivated cucurbitaceous plants. While in Fukuoka so far observed, Sph. fuliginea is the only cause of the mildew of the cucurbitaceous plants.
    The occurrence of perithecial formation of Sph. fuliginea on cucurbitaceous hosts is not uncommon in Fukuoka late in the fall, though it is said difficult to find the perithecia in other districts of Japan.
    The mildew fungi (E. cichoracearum and others) obtained from Nicotiana tabacum, Artemisia vulgaris, Sesamum indicum, and Bidens bipinnata are not infectious to cucumber, while the fungus from Arctium lappa (Sph. fuliginea) is pathogenic to cucumber.
    Sph. fuliginea from cucumber is infectious to Arctium lappa and Phaseolus radiatus, but is not infectious to Solanum melongena, Chrysanthemum coronarium, Helianthus tuberosum, Hel. annuus, and Nicotiana tabacum.
    The difference of resistance due to the difference of ages of the leaves of cucumber against the infection by Sph. fuliginea has been observed. Young leaves which had past 0 to 3 days. before the inoculation, in this experiment, were not affected when examined 5 days after inoculation, and the most susceptible leaves were those which had past 16 to 23 days before the inoculation.
  • 廣江 勇
    1952 年 16 巻 3-4 号 p. 127-131
    発行日: 1952年
    公開日: 2009/04/21
    ジャーナル フリー
    In the present paper the writer intends to report on the results of the author's pathological and physiological researches on culture filtrates of the causal fungus of black spot disease of Japanese pears, Alternaria Kikuchiana TANAKA.
    1) The results of biological experiments on toxic action of culture filtrates of the fungus to host plant were described.
    2) The pathogenicity of culture filtrates of 25 species and 8 strains of phytopathogenic fungi belon-ging to genera, Alternaria, Fusarium, Colletotrichum, Macrosporium and Venturia was tested. It was decidedly considered that the characteristic symptom of the disease appears only by Alternaria Kikuchiana.
    3) Effect of deficiency of some elements in synthetic nutrient solutions on the pathogenicity of Alternaria Kikuchiana and toxicity of culture filtrates, was studied. From the results, it seems that there is an exact relation between the occurreence of the disease and culture filtrates and also the protoplasmic speciality of host plant.
    The protoplasmic speciality of host plant is remarkably sensitive to culture filtrates of the causal fungus, accordingly, in the present paper the term, HYPERSENSITIVE DISEASE OF PLANTS is newly suggested by the writer. (Laboratory of Phytopathology, Faculty of Agriculture, Tottori University)
  • 後藤 和夫
    1952 年 16 巻 3-4 号 p. 132-136
    発行日: 1952年
    公開日: 2009/04/21
    ジャーナル フリー
    In nature Sclerotium Rolfsii attacks the hosts usually at their foot. In a case was observed by the author a Hibiscus plant attacked at about a meter above the ground. By what means the pathogene reached at that height is still unknown. It may be possible that the infection has been caused by basidiospores transported by flow of air. It is therefore interesting to know the relation of germination of basidiospores.
  • 渡邊 龍雄, 田村 實
    1952 年 16 巻 3-4 号 p. 137-140
    発行日: 1952年
    公開日: 2009/04/21
    ジャーナル フリー
    The writers found the ascigerous stage of the cucumber anthracnose fungus, Colletotrichum lagenarium (PASS.) ELLIS et HALSTED, in a potato agar culture in March 1949. Morphological examinations proved the fungus to be included in the genus. Glomerella.
    The amount of production of ascospore was scarcely effected by temperature, but the rate of ascosporic production was delayed under higher temperature (25-30°C) than under lower temperature (20-15°C). The fungus produced ascospores more copiously and rapidly in potato-decoction and potato-decoction-agar cultures, compared with cultures on other kinds of media.
    The fungus differs in important respects from previously described species of Glomerella, especially from the bean anthracnose fungus, Glomerella Lindemuthianum (SACC. et MAG.) SHEAR and is here designated a new species.
    Glomerella lagenaria (PASS.) WATANABE et TAMURA, nov. sp. Perithecia spherical, subspherical or pyriform, membraneous, immersed in a stroma, dark-brown, 112-256μ in diameter; asci sessile, clavate or cylindrical, hyaline, 47.5-77.5μ in length and 7.5-11.25μ in width; ascospores 8, hyaline, oblong, slightly curved or straight, elliptical or fusoid, 1-celled, 12.5-27.5μ in length and 3.75-6.25μ in width; paraphyses none.
    Conidial stage: Colletotrichum lagenarium (PASS.) ELLIS et HALSTED in Bull. Torrey Bot. Club, Vol. 20, pp.109-112, 1893.
  • 深野 弘, 横山 佐太正
    1952 年 16 巻 3-4 号 p. 141-143
    発行日: 1952年
    公開日: 2009/04/21
    ジャーナル フリー
    The rice infected by white tip nematodes was disinfected with simplified hot-water treatment, soaking for ten hours in bath water, the temperature of which was left as it dropped; viz. 44.7-46.1°C at the beginning and 20.7-31.6° Cat the end. Good control, occasionally perfect control was obtained by this treatment. The treat ment had practically no injurious effect on the germination of rice seed. But, it is a matter of concern that the effectiveness of this method may not be constant, as the temperature of bath water is apt to fluctuate too much, influenced by various conditions.
  • 1952 年 16 巻 3-4 号 p. 144-154
    発行日: 1952年
    公開日: 2009/04/21
    ジャーナル フリー
  • 1952 年 16 巻 3-4 号 p. 154-171
    発行日: 1952年
    公開日: 2009/04/21
    ジャーナル フリー
  • 1952 年 16 巻 3-4 号 p. 171-179
    発行日: 1952年
    公開日: 2009/04/21
    ジャーナル フリー
  • 1952 年 16 巻 3-4 号 p. 180-192
    発行日: 1952年
    公開日: 2009/04/21
    ジャーナル フリー
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