Nematological Research (Japanese Journal of Nematology)
Online ISSN : 1882-3408
Print ISSN : 0919-6765
ISSN-L : 0919-6765
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Volume 44, Issue 1
Displaying 1-2 of 2 articles from this issue
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ORIGINAL ARTICLE
  • Influences of a radish and sweet potato continuous ridge use system on root-knot nematode damage to sweet potato
    Takayuki Suzuki, Hiroshi Niimi, Kenta Uesugi, Hideaki Iwahori, Katsuk ...
    2014 Volume 44 Issue 1 Pages 1-8
    Published: July 20, 2014
    Released on J-STAGE: August 22, 2014
    DOIhttps://doi.org/10.3725/jjn.44.1
    JOURNAL FREE ACCESS
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    The influences of continuous ridge use (CRU) on root-knot nematode (RKN) damage to sweet potato was investigated in a double cropping system that uses radish in winter and sweet potato in summer. The CRU system tended to show reduced RKN damage to sweet potato relative to the conventional system (TR system), in which the field was tilled and ridged before sweet potato cultivation. RKN population density after the radish harvest was low in the upper area of the ridge in both the CRU and the TR systems. In the TR system, density in the upper area of the ridge was slightly increased after tillage and ridging. Low density in the upper area of the ridge is suggested as one of the reasons for the decrease in damage to sweet potato in the CRU system. Adoption of the CRU system would be one method of reducing RKN damage to sweet potato.
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REVIWE (IN JAPANESE WITH ENGLISH SUMMARY)
  • Taxonomy of superfamily Aphelenchoidea and key to genera
    Natsumi Kanzaki
    2014 Volume 44 Issue 1 Pages 9-26
    Published: July 20, 2014
    Released on J-STAGE: August 22, 2014
    DOIhttps://doi.org/10.3725/jjn.44.9
    JOURNAL FREE ACCESS
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    Aphelenchoidea, which contains plant parasites, fungal feeders, insect parasites and predators, is biologically divergent superfamily. The superfamily is separated into two families, Aphelenchidae and Aphelenchoididae, however these two families are phylogenetically apart from each other, and thus the superfamily is not a “good natural taxon”. Nevertheless, considering their morphological similarity, e.g., very well-developed median bulb, and biological similarity, it is reasonable to retain this superfamily as tentative taxonomic group. In the present review, the morphological characters and the taxonomic status of the superfamily are summarized, and the taxonomic table and pictorial key to the genera are provided.
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