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Volume 6 (1936 - 1937･･･
- Issue 4 Pages 289-
- Issue 3 Pages 195-
- Issue 2 Pages 101-
- Issue 1 Pages 1-
Volume 6, Issue 1
Displaying 1-9 of 9 articles from this issue
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Teinosuke KAWAMURA1936 Volume 6 Issue 1 Pages 1-14
Published: 1936
Released on J-STAGE: April 03, 2009
JOURNAL FREE ACCESSVon dem, was ich über die Sklerotienkrankheiten der Tulpen sammeln konnte, stelle ich hier einige wichtige Punkte zusammen.
1) Es scheint mir sehr wahrscheinlich, dass ein Sklerotium, Scl. bulborum (WAKK.) REHM., das in den bisherigen Mitteilungen als ein Erreger der Tulpenkrankheit bezeichnet ist, von der Tulpenzwiebel unabhängig ist.
Auch ein wichtiger Parasit der Tulpen, Scl. tuliparum KLEP., ist vielleicht mit dem Weiss-Seide-Krankheitserreger (Sirakinu-Byô), Scl. Rolfsii SACC., identisch.
Die die Tulpenzwiebeln bei uns infizierenden Sklerotien sind hiernach folgende:
Scl. tuliparum KLEB.=Scl. Rolfsii SACC.
Scl. Fuckcliana (D. BY.) FUCKL.=Bot. cinerca PERS.
Botrytis tulipae (LIB.) HOPK.
2) Ein neues Untersuchungsverfahren über die Lebensdauer der Sklerotien besteht im wesentlichen darin, dass man die Sklerotien unter bestimmten Bedingungen liegen lässt und dann nicht nur die unbehandelten ganzen Körper der Sklerotien, sondern auch die geschnittenen Hälften wien gewöhnlich auf neuem Nährboden kultiviert. Diese Versuche haben gezeigt, dass die Vergleichung zwei Kulturen für einschlägige Sklerotienuntersuchung von grosser Bedeutung ist.
3) Unter den Sklerotien der Tulpen, Scl. Rolfsii SACC., kann ich wenigstens acht Rassen unterscheiden. Solche Sklerotien schmarotzen gleichmässig fast auf allen Tulpensorten. Dagegen ist es mir leider trotz vielfacher Bemühungen nicht gelungen, mit denselben Sklerotien Hyazinthen, Scilla, Crocus, Gladiolus, Dahlia, Canna, Holländisch-und Chinesische Narzisse und Lilien zu impfen, abgesehen von Crocus, Scilla und Hyazinthen, die im Stadium der Treibung an den Knospen schmarotzt wurden. Andererseits waren die zur Kontrolle gewählten Tulpenzwiebeln ausnahmslos mit denselben Sklerotien infiziert.View full abstractDownload PDF (901K) -
Takuji ABE1936 Volume 6 Issue 1 Pages 15-26
Published: 1936
Released on J-STAGE: April 03, 2009
JOURNAL FREE ACCESS1. This paper deals with the results of the experiments on the pathogenicity of culture strains of the rice-blast fungus as well as on the varietal susceptibility of the rice plant to the disease. In the experiments, the leaves of the rice plant grown to the booting stage and the pedicels of spikes were inoculated with the spore suspensions of nine culture strains of the fungus.
2. The pathogenicity of each culture strain was obviously lower when inoculated on the leaves in the booting stage than when inoculated in the seedling stage. The writer was able to recognize, however, a distinct differentiation in the pathogenicity of culture strains of the fungus tested. The strains No.XIII and No.IX showed the strongest pathogenicity. The pathogenicity of the strain No.V was weakest, that of No.XXII being medium. The strains No.XVIII and No.XX seemed to have a rather weak pathogenicity. In all experiments the strains No.XVII and No.VII indicated no pathogenicity on the leaves of the grown plants.
3. The culture strain, which showed the strongest pathogenicity on the pedicels of spikes, was No.IX. The strains No.XIII, No.XII and No.XXII followed to No.IX in order. The strains No.XX and No.XVIII showed the medium and No.V the weak pathogenicity on the pedicels of spikes, while No.VII and No.XVII showed the weakest. The results of the above experiment agree nearly with those of the inoculation experiment on the leaves of the grown plants. Namely, there seemed to be a distinct differentiation in the pathogenicity of culture strains of the present fungus.
4. Pedicels of spikes of 16 varieties of the rice plant, which seeds had been sent from four different localities of Japan (Yamagata, Nagano, Okayama and Hukuoka prefectures), were inoculated with three culture strains of the causal fungus. Without exception, the culture strain No.IX showed the strongest pathogenicity on all varieties of the rice plant tested. Although the pathogenicities of the strains No.V and No.XVIII were almost indistinguishable, the latter seemed to be slightly stronger than the former.
5. The seeds of a few varieties of the rice plant from the above localities were selected. Comparing their susceptibility for the strongest strain No.IX, the writer recognized clearly that the varieties, “Igô” (Yamagata), “Bôzutamagawa, Mubôaikoku” (Nagano), “Kamezi No.3” (Okayama) and “Aikoku” (Hukuoka) are most resistant. The varieties “Waseôno” (Yamagata), “Kinaiwase No.68, Kinaiwase No.69” (Nagano) and “Kômyônisiki” (Okayama) were most susceptible for the same strain. The susceptibility of “Toyokuni, Tôgô” (Yamagata) and “Kinaiwase No.22” (Nagano) were intermediate.View full abstractDownload PDF (567K) -
II. Puccinia Kusanoi DIETH. ASUYAMA1936 Volume 6 Issue 1 Pages 27-29
Published: 1936
Released on J-STAGE: April 03, 2009
JOURNAL FREE ACCESSInoculation experiments with the teliospores of Puccinia Kusanoi DIET. from the leaves of Plcioblastus (Arundinaria) Simoni NAKAI and P. chino (FRANCH. et SAV.) MAKINO. showed that Deutzia scabra THUNP. var. crenata MAKINO (Saxifragaceae) is one of the alternate hosts. The aecial form produced on Deutzia scabra is identified with Aecidium Deutsiae DIET.View full abstractDownload PDF (104K) -
T. WATANABE, M. TAKESAWA1936 Volume 6 Issue 1 Pages 30-47
Published: 1936
Released on J-STAGE: April 03, 2009
JOURNAL FREE ACCESS1. The morphological, physiological and pathological studies were made on the leaf-spot of the hemp (Cannabis sativa L.) caused by Septoria Cannabis (LASCH) SACC.
2. The disease in question seems to appear first in the early summer on the leaves of the plants, especially on the lower ones. The spots are ellipsoidal or polygonal and yellowish to grayish brown. The disease spreads gradually as the season becomes warmer during June to July, often resulting in the premature fall of the leaves.
3. The pycnidia of the fungus are generally formed under the epidermis of the upper surface of the leaf, being immersed in the palisade tissue, and the epidermis are perforated by minute ostioles. The pycnidia are spherical or flat in shape and measure about 27.5 to 115.5 μ in diameter and are light brown in colour. The pycnospores are filiform, straight or slightly curved, smooth and hyaline. Their measurements are 12-46×2-3μ and the septa are 0 to 5, commonly 3.
In culture media the pycnidia are 85 to 465μ in diameter and their colour is brown or black, while the characters of pycnospores are the same as those observed on affected leaves.
4. The cultural characters of the fungus were studied on ten different media. It was found that the most suitable medium for the mycelial growth was potato decoction agar and that for the formation of pycnidia and pycnospores was hemp decoction agar and soy agar after SAITO's formula.
5. The relation of temperature to the growth of the fungus was studied on soy agar, potato decoction agar and on nutrient agar with pepton. It was found that the optimum temperature for the mycelial growth was 25°C, the minimum below 9°C, and the maximum about 35°C.
6. The relation of hydrogen-ion concentration to the mycelial growth was studied on RICHARD's agars of different hydrogen-ion concentrations which were prepared using caustic soda and sulphuric acid. The growth occurred in media the pH of which were from pH 1.8-2.2 to 9.8<, and at 5.2 the most favourable growth was observed.
7. The relation of hydrogen-ion concentration to the growth of germ-tubes from pycnospores was studied by sowing them on RICHARD's solution of different pH. The highest percentage of germination was shown at pH 4.2-8.2 and it was low at pH 2.2. At pH 9.8< the germination took place moderately.
8. The inoculation experiments using the pycnospores produced on hemp decoction agar were carried out with success on leaves of the host plant. The incubation period of the disease was about 6-7 days in September.View full abstractDownload PDF (2035K) -
[in Japanese]1936 Volume 6 Issue 1 Pages 48-52
Published: 1936
Released on J-STAGE: April 03, 2009
JOURNAL FREE ACCESSDownload PDF (188K) -
[in Japanese]1936 Volume 6 Issue 1 Pages 53-54
Published: 1936
Released on J-STAGE: April 03, 2009
JOURNAL FREE ACCESSDownload PDF (86K) -
1936 Volume 6 Issue 1 Pages 64-76
Published: 1936
Released on J-STAGE: April 03, 2009
JOURNAL FREE ACCESSDownload PDF (656K) -
1936 Volume 6 Issue 1 Pages 76-85
Published: 1936
Released on J-STAGE: April 03, 2009
JOURNAL FREE ACCESSDownload PDF (499K) -
1936 Volume 6 Issue 1 Pages 86-96
Published: 1936
Released on J-STAGE: April 03, 2009
JOURNAL FREE ACCESSDownload PDF (579K)
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