Journal of Japanese Society of Turfgrass Science
Online ISSN : 1884-4022
Print ISSN : 0285-8800
ISSN-L : 0285-8800
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Volume 33, Issue 2
Displaying 1-7 of 7 articles from this issue
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  • The relative efficacy of toxic core fragments of three Bacillus thuringiensis insect control proteins against lepidopteran insects damaging turf and the efficacy of the CrylAc toxin against these insects plus an insect damaging rice
    Masanobu FUKAMI, Masatoshi KOJIMA, Satoshi MARU, Yasuyuki ITO, Masashi ...
    2005 Volume 33 Issue 2 Pages 109-115
    Published: March 31, 2005
    Released on J-STAGE: June 08, 2010
    DOIhttps://doi.org/10.11275/turfgrass1972.33.109
    JOURNAL FREE ACCESS
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    The relative efficacy of toxic core fragments of three lepidopteran-specificBacillus thuringiensisinsect control proteins, Cry1Aa, Cry1Ab and Cry1Ac, were determined against two most damaging turf insects, Pediasia teterrellusandSpodoptera, depravata. The toxic core fragments of the three proteins were obtained through expression inEscherichia coli. The most toxic among the three was the fragment of Cry1Ac against both lepidopteran insects. The efficacy of the Cry1Ac toxin was also determined against these insects plusParnara guttata. The level of this protein required for 50% motality (LC50) againstP. teterrellus, S. depravataandP.guttatawere 0.65ppm, 2.5ppm and 0.044 ppm, respectively.
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  • Evaluation of school turfs using Contingent Valuation Method
    -A case study of two elementary schools in Chiba prefecture-
    Takeshi SADA, Yoshito ASANO
    2005 Volume 33 Issue 2 Pages 116-121
    Published: March 31, 2005
    Released on J-STAGE: June 08, 2010
    DOIhttps://doi.org/10.11275/turfgrass1972.33.116
    JOURNAL FREE ACCESS
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    For the purpose of estimating the appropriateness to have school turf, we performed cost-benefit analysis using CVM (Contingent Valuation Method) for the turfs of two public elementary schools in Chiba prefecture. The WTP (Willingness to Pay) of the parents of the schoolchildren for managing the school turfs were 1, 845, 2, 380 yen (median) or 2, 487, 2, 751 yen (mean) per year. These were higher per area compared to those of neighborhood parks. The parents, who have an intention to participate in turf management, showed higher WTP. The benefit of the school turfs was higher than the cost. Warm-season turfgrass was more cost effective than cool-season turfgrass. As the result, we conclude that school turf is beneficial for the society and it is well worth to have.
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  • Morphological Characteristics of Zoysia tenuifolia Willd
    Hikaru AKAMINE, Yasuhiro KAWAMOTO, Yukio ISHIMINE, Hitoshi KURAMOCHI, ...
    2005 Volume 33 Issue 2 Pages 122-126
    Published: March 31, 2005
    Released on J-STAGE: June 08, 2010
    DOIhttps://doi.org/10.11275/turfgrass1972.33.122
    JOURNAL FREE ACCESS
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    Thirty-five Zoysiagrass specimens were collected from the southwestern islands of Japan, and their morpho-logical characteristics were evaluated to classify them. It was quite difficult to classify the specimens ofZ. tenuifoliaandZ. matrellain accordance with the standard classification method as leaf width, because the values of leaf width were continuously distributed between 0.29 to 1.86 mm.
    Therefore, the leaf shapes and structures of these specimens were evaluated as the other methods. The buds in the sheaths showed obviously different structures, which were folded and rolled. The folded bud was identified asZ. tenuifolia, and the rolled one was identified asZ. matrella. In this method, it was possible to classify the narrow-leafZ. matrellaof less than 1mm, which was visually similar toZ. tenuifolia.
    As mentioned above, the careful obsevation of bud structure is a useful parameter for classification ofZ. tenuifoliaandZ. matrella.
    Furthermore significant differences were observed in leaf-blade length, internode length and ear length among the 12 types ofZ. tenuifoliaevaluated. The smallest type was the commercial cultivar, and the largest one was Miyako island type, which were corresponded to the characeristic ofZ. tenuifolia. This large type ofZ. tenuifoliahas firstly been identified in this study.
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  • [title in Japanese]
    [in Japanese]
    2005 Volume 33 Issue 2 Pages 127-131
    Published: March 31, 2005
    Released on J-STAGE: June 08, 2010
    DOIhttps://doi.org/10.11275/turfgrass1972.33.127
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    2005 Volume 33 Issue 2 Pages 132-134
    Published: March 31, 2005
    Released on J-STAGE: June 08, 2010
    DOIhttps://doi.org/10.11275/turfgrass1972.33.132
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    2005 Volume 33 Issue 2 Pages 135-139
    Published: March 31, 2005
    Released on J-STAGE: June 08, 2010
    DOIhttps://doi.org/10.11275/turfgrass1972.33.135
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    2005 Volume 33 Issue 2 Pages 141-143
    Published: March 31, 2005
    Released on J-STAGE: June 08, 2010
    DOIhttps://doi.org/10.11275/turfgrass1972.33.141
    JOURNAL FREE ACCESS
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