Nematological Research (Japanese Journal of Nematology)
Online ISSN : 1882-3408
Print ISSN : 0919-6765
ISSN-L : 0919-6765
Volume 37, Issue 1
Displaying 1-3 of 3 articles from this issue
ARTICLES
  • Yasushi Tateishi, Zen-ichi Sano, Hideaki Iwahori
    2007 Volume 37 Issue 1 Pages 1-9
    Published: June 30, 2007
    Released on J-STAGE: July 21, 2010
    JOURNAL FREE ACCESS
    Reproduction of root-knot nematodes and plant damage to the sweet potato cropping system treated with Pasteuria penetrans, a parasitic bacterium of nematodes, were examined in a field plot test. Bacterial cultures were applied to nematode-infested soil at a concentration of 7 × 109 endospores / 9 m2 plot, and sweet potato cropping systems were conducted during an eight-year period. In a consecutive cropping system with Kokei 14, a susceptible cultivar, significantly higher density of the P. penetrans endospores was observed in the soil at the end of the fourth year. In this system, population densities of the second-stage juvenile of Meloidogyne spp. in the soil had been lower than in the system without bacterial application since the third year. In this system, a yield of marketable storage root was obtained comparable to that treated with 1,3-dichloropropene (92% a.i., 20 l / 10 a) fumigation in the fifth and sixth year. In a rotational cropping system using Beniotome, a cultivar which has resistance, suppressive effects of P. penetrans application emerged in the sixth and eighth year.
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ARTICLES (in Japanese with English Summary)
  • Hiroki Komatsu, Toyoshi Yoshiga, Eizo Kondo
    2007 Volume 37 Issue 1 Pages 11-19
    Published: June 30, 2007
    Released on J-STAGE: July 21, 2010
    JOURNAL FREE ACCESS
    The effects of the root lesion nematode Pratylenchus penetrans on the growth of six chrysanthemum cultivars were investigated by using cell trays and pots. Of all the cultivars tested, the Iwa-no-hakusen cultivar was most heavily damaged by the nematode. At 20 days after nematode inoculation, the nematode number in the roots of the Shuho-nochikara cultivar was significantly higher than that in the other five cultivars. However, very few necrotic root lesions were observed on Shuho-no-chikara and the root growth and plant height were not retarded. The nematode number in the root system of the four Higogiku cultivars — Akebono-no-hikari, Zuisho, Senjin-no-umi, and Hourei was similar to each other and no significant difference was observed in the root growth of the four Higogiku cultivars at 20 days after nematode inoculation. Based on these results together with some additional information, we classified Iwa-no-hakusen, Shuho-no-chikara, and the four Higogiku cultivars as suitable/susceptible, suitable/tolerant, and unsuitable/tolerant hosts for P. penetrans, respectively.
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  • Eiiti Yamada, Futoshi Sakuma, Shigeru Yamashita, Minoru Takahashi
    2007 Volume 37 Issue 1 Pages 21-36
    Published: June 30, 2007
    Released on J-STAGE: July 21, 2010
    JOURNAL FREE ACCESS
    Field tests were conducted to clarify the seeding time and seeding rate for the highest antagonistic effect on nematode density by Lycopersicon peruvianum, Solanum sisymbriifolium and S. nigrum cultivation in Globodera rostochiensis (PCN) infested fields at Shiribeshi County, Hokkaido, Japan. Hatchability of PCN in soil sown with L. peruvianum was much greater than S. sisymbriifolium and S. nigrum, and decreasing densities of PCN in L. peruvianum soil was the highest among the three solanaceous plants. The antagonistic effect of spring sowing (June) of L. peruvianum was greater than summer sowing (August), and an excellent effect was obtained at the 1 kg/10 a seeding rate for spring sowing of L. peruvianum, which was equivalent to the effect of the resistant potato variety“Hana-Shibetsu”(H1).
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