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Volume 1974, Issue 41
Displaying 1-10 of 10 articles from this issue
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Aogu NAKAYAMA1974 Volume 1974 Issue 41 Pages 1-7
Published: June 20, 1974
Released on J-STAGE: July 31, 2009
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Taketoshi KAJITA, Minoru IMANISHI1974 Volume 1974 Issue 41 Pages 8-11
Published: June 20, 1974
Released on J-STAGE: July 31, 2009
JOURNAL FREE ACCESSInvestigations were made on the relation between the quality of tea and the places of production in Nara Prefecture and the results were as follows:
1) At the same place of production, the first croped tea contained more total nitrogen, molybdenum, magnesium and nickel than the second croped tea, while the latter contained more tannin, Vitamin C, calcium, iron and manganese than the former.
Irrespective of the place of production, the difference in the quantity of genuine nitrogen, tannin, Vitamin C, was not so remarkable but calcium, iron, and manganese were found the most in the tea, first and second croped, in Yamazoe district.
2) In any place of production, the first croped tea was superior to the second croped one and those produced in Tsukigase district were the most superlative. Further, very close relation was found between the analysis results and green tea test results.
3) Concerning to the quantity of the components of tea which dissolves itself, investigations were made, on the tea produced in different places. The dissolving quantity of soluble nitrogen was generally found mote for the tea whose quality was superior. Thus, soluble nitrogen was recognized to have plus correlation with the quality but manganese to have minus corelation, while no clear conclusion was obtained for calcium.View full abstractDownload PDF (247K) -
Yoshimitsu YANASE1974 Volume 1974 Issue 41 Pages 12-15
Published: June 20, 1974
Released on J-STAGE: July 31, 2009
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Hideya AONO, Yoshimitsu YANASE, Shizuo TANAKA1974 Volume 1974 Issue 41 Pages 16-36
Published: June 20, 1974
Released on J-STAGE: July 31, 2009
JOURNAL FREE ACCESS1. In the spring 1972, the frost injury in the tea field was very severe and it covered wide areas. We carried out an actual survey on the influence on the shoot growth, yield and the price of tea after the injury, and the effects of several preventive measures were researched as occured.
2. The frost injury occured all over the country, especially on 2nd, 3rd and 10th April and 3rd May. And the minimum air temprature was -6.0°C at Miyazaki and Nagano prefecture. Therefore, the plucking time of first crop was delayed and the yield of tea was decreased everywhere, accordingly the earning was decreased though the price of tea was dear slightly.
3. The degree of injury differed with the condition of locality and the type of cultivation in the tea field. But the relations between these conditions and the injury did not differ when compared with previous survey.
4. On the preventive measure of the frost injury in the tea field, the protection methods by covering, heating and fog were adopted from old times, but in addition to these methods the protections by the wind machines and the application of water were used.
As the frost protection by covering was effective, the practice of using chemical fibre cloth for protection became more extensive. But when the air temperature was dropped extremely the effect was not perfect though the growth of new shoots after the injury was more rapid than non-covering ones. The protections by the wind machines and the application of water were effective, but they had some doubtful points to the practical use. The protections by heating and fog were not effective.View full abstractDownload PDF (1337K) -
Hideo KIBUSHI, Akinori EZUKA, Kyuzo KASAI1974 Volume 1974 Issue 41 Pages 37-43
Published: June 20, 1974
Released on J-STAGE: July 31, 2009
JOURNAL FREE ACCESSTwo species of fungi belonging to the genus Pestalotia were found to be parasitic on leaves and young stems of tea variety Natsumidori showing the symptom of grey blight in Shizuoka Prefecture during 1954.
One was undoubtedly identical in the morphological characters with Pestalotia theae SAW. which was hitherto considered to be responsible for grey blight of tea plant. The other was very much similar to Pestalotia palmarum CKE. described by SAWADA (1913, '15) to be weakly parasitic on tea plant in Taiwan.
GUBA (1929, '32) emphasized the host specificity in Pestalotia fungi and stated that the species were closely restricted to one host or several hosts in related genera. According to him, the host range of P. palmatunl CKE. is restricted within the species of palms, and P. theae SAW. alone can be parasitic on tea plant.
Despite of GUBA's assertion, it is true that there is another species of Pestalotia parasitic on tea plant in Japan and presumably in Taiwan. The authors' species is apparently different from P. theae SAW. in its shorter conidial size, in its usually darker colour of two upper coloured cells than the lower, and in its setae never knobbed. This species is rather similar to P. palmaruyn CKE. on palms described carefully by GUBA, though it is slightly different from GUBA's description where the two upper coloured cells are "occasionally darker" than the lower and the setae are "often knobbed." It is a difficult question whether these slight differences are valid for distinguishing one species from another. The answer depends on the validity of the host specificity in .Pestalotia proposed by GUBA. The conclusive identification of the authors' species is retained here because of the lack of reciprocal inoculation experiment between the species and P. palmarum CKE. from palms.
The symptoms on tea due to both fungi of P. there SAw. and the unidentified species are just the same, so that it was impossible to distinguish them with the naked eye. It is proposed to apply the name "grey blight" to the disease including both fungi parasitic on tea plant, as a matter of practical convenience in agriculture.View full abstractDownload PDF (1794K) -
Takashige TERADA, Minoru IMANISHI1974 Volume 1974 Issue 41 Pages 44-47
Published: June 20, 1974
Released on J-STAGE: July 31, 2009
JOURNAL FREE ACCESSIn Nara prefecture, some parasites of scale insects on tea twigs were frequently found for the past several years. One of these parasites formed the scarlet perithecia and red to orange horny masses of conidia round the edge of the scale insects.
In the raing season, when the population of the mulberry scale (Pseudaulacaspis pentagona Trag. & Tozz.) increased large, this fungus tended to appear in abundance. Because of the development of the fungal parasite, the population of the living scale insects tended to decrease.
In this respect, we considered the possible use of this fungus for the purpose of the microbial control of the mulberry scale and tried to isolate and identify the fungal parasite.
The perithecia on the scale insects were globose with a small ostiolar papilla, 380-450μin diameter. They had 8-spored cylindrical asci. The ascospores were ellipsoidal, uniseptate, smooth, pale brown, slightly constricted at the septum and 15-22×8-9μ in size.
The conidia were cylindrical, slightly bended towards the both ends, hyaline, smoth, 7-11 septa and 89-153×5-8μ in size.
Sporodochial structure and conidial size of this species formed in culture did not differ from those formed on the diseased insects.
Both ascospore and conidium produced the conidia in culture but the perithecial formation has never been found in culture.
Judging from the morphology and its natural habitat, we concluded that this species should correctly be identified as Nectria flainnica (Tulasne) DINGLEY (conidial state is Fusarium coccophilum. (Desm.) Wollenw. & Reink.) defined by DINGLEY and also by BOOTH. This was also endorsed by Dr. T. Yokoyama, Institute for Fermantation, Osaka.
Concerning the Japanese name, we recommended the application of the oldest name "Kaigaramushi Shokobyo" (scarlet fungus disease of scale insects) proposed by Nomura to the fungus disease included in this category.View full abstractDownload PDF (2789K) -
Tei YAMANISHI, Atsuko UCHIDA, Yohko KAWASHIMA, Yamato FUJINAMI, Makiko ...1974 Volume 1974 Issue 41 Pages 48-53
Published: June 20, 1974
Released on J-STAGE: July 31, 2009
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Takeo MASUZAWA1974 Volume 1974 Issue 41 Pages 54-58
Published: June 20, 1974
Released on J-STAGE: July 31, 2009
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Teruo SHIONO1974 Volume 1974 Issue 41 Pages 59-67
Published: June 20, 1974
Released on J-STAGE: July 31, 2009
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[in Japanese], [in Japanese], [in Japanese]1974 Volume 1974 Issue 41 Pages 68-78
Published: June 20, 1974
Released on J-STAGE: July 31, 2009
JOURNAL FREE ACCESSDownload PDF (11021K)
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