Japanese Journal of Applied Entomology and Zoology
Online ISSN : 1347-6068
Print ISSN : 0021-4914
ISSN-L : 0021-4914
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Volume 45, Issue 4
Displaying 1-7 of 7 articles from this issue
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Regular Papers
  • Control of Helicoverpa armigera (Hübner) by Mating Disruption Using Diamolure in Lettuce Fields
    Goro Toyoshima, Soichi Kobayashi, Takeshi Yoshihama
    Article type: Regular Paper
    Subject area: [not specified]
    2001 Volume 45 Issue 4 Pages 183-188
    Published: 2001
    Released on J-STAGE: April 25, 2003
    DOIhttps://doi.org/10.1303/jjaez.2001.183
    JOURNAL FREE ACCESS
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    The mating disruptive effect of the synthetic sex pheromone diamolure on Helicoverpa armigera (Hübner) was examined in lettuce fields. The number of adult males attracted to sex pheromone traps in treated fields was less than those in the non-treated fields. In addition, the number of mated females and injured lettuce plants in the treated fields were both lower than those in the non-treated fields. Accordingly, diamolure was effective as a mating disruptive agent for H. armigera.
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  • Efficiency of a Sticky Trap for Censusing the Natural Enemy Fauna of Spider Mites
    Hideo Takahashi, Akio Takafuji, Junji Takabayashi
    Article type: Regular Paper
    Subject area: [not specified]
    2001 Volume 45 Issue 4 Pages 189-194
    Published: 2001
    Released on J-STAGE: April 25, 2003
    DOIhttps://doi.org/10.1303/jjaez.2001.189
    JOURNAL FREE ACCESS
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    In pear orchards, we studied the efficiency of a sticky trap method for censusing the natural enemy fauna of the spider mite Tetranychus kanzawai. When compared to beating and direct observation methods, the sticky trap captured a larger number of insect predator species. The sticky trap was particularly useful for censusing Stethorus japonicus and Orius spp. when the density of the spider mite was low in the orchards. The sticky traps with synthetic plant volatiles slightly, but significantly increased the number of Orius spp. captured in the trap when compared with the traps without the chemicals.
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  • Ten-Year Trend in Insect Fauna Detected at the Plant Quarantine of Japan
    Masami Masumoto, Shin'ichi Takahara, Yoichi Shirai
    Article type: Regular Paper
    Subject area: [not specified]
    2001 Volume 45 Issue 4 Pages 195-201
    Published: 2001
    Released on J-STAGE: April 25, 2003
    DOIhttps://doi.org/10.1303/jjaez.2001.195
    JOURNAL FREE ACCESS
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    Annual and quantitative trends in import plant and insect pest fauna detected during plant quarantine are summarized for the periods of 1989–1998, based on the statistics of the Plant Protection Station of Japan. Quantities of imported fresh plants has increased during these 10 years, whereas that of stored plants has scarcely changed and that of timber has decreased. Seventeen orders of pests including insects and other invertebrates have been detected during plant quarantine; seven orders (Coleoptera, Diptera, Hemiptera, Lepidoptera, Thysanoptera, Acarina, and Stylommatophora) were significantly dominant. In 1989, more than 50% of the insect pests were from stored plants and timber, consisting of mostly Coleoptera and Lepidoptera. The detection of insect pests from stored plants and timber has gradually decreased. In 1998, the insect pests from fresh plants reached more than 70% in total, because the frequencies of insect pests from fresh plants has not changed for 10 years from 1989 to 1998. The above seven orders were universally detected from fresh plants. The significance of quarantine for fresh plants is discussed.
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  • Estimating the Overwintering Mortality of the Apple Snail, Pomacea canaliculata (Lamarck) (Gastropoda: Ampullariidae) in a Paddy Field of Southern Japan Using Temperature Data
    Shin-ichirou Syobu, Hatsuko Mikuriya, Junichirou Yamaguchi, Masafumi M ...
    Article type: Regular Paper
    Subject area: [not specified]
    2001 Volume 45 Issue 4 Pages 203-207
    Published: 2001
    Released on J-STAGE: April 25, 2003
    DOIhttps://doi.org/10.1303/jjaez.2001.203
    JOURNAL FREE ACCESS
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    Overwintering mortality of the apple snail, Pomacea canaliculata was investigated in a paddy field of Southern Japan for seven consecutive years. Field data and laboratory experiments revealed snails larger than 6.0 mm exhibited higher cold tolerance than small snails. Seven-years of field data showed that a linear regression explained a close relationship between the overwintering mortality of snails larger than 6.0 mm and the cumulative low temperature calculated as the subtraction of the hourly temperature from 10°C (CLT). A high correlation was also observed between overwintering mortality of snails and the mean temperature between December and February. Thus, temperature data seems to be practical and effective in estimating mortality of field snails during the winter.
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