Japanese Journal of Applied Entomology and Zoology
Online ISSN : 1347-6068
Print ISSN : 0021-4914
ISSN-L : 0021-4914
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Volume 54, Issue 2
Displaying 1-11 of 11 articles from this issue
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Regular Papers
  • Evaluation of California Poppy and Petunia as Trap Plants to Control the White Swelling Spot of Tomato by Flower Thrips, Frankliniella intonsa (Trybom) (Thysanoptera: Thripidae)
    Kazuya Nagai, Mitsuharu Hikawa
    Article type: Original Article
    2010 Volume 54 Issue 2 Pages 65-70
    Published: May 25, 2010
    Released on J-STAGE: June 08, 2010
    DOIhttps://doi.org/10.1303/jjaez.2010.65
    JOURNAL FREE ACCESS
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    A trap plant system using a mixed planting of California poppy and petunia to control the white swelling spot of tomato caused by flower thrips, Frankliniella intonsa (Trybom), was evaluated in an experimental field. In a field planted with tomatoes, we set a mixed culture plot of California poppy and petunia, and a control plot of tomato monoculture. As the number of California poppy flowers declined after mid-June but that of petunia increased from that time, the flowering time of the trap plant system continued during the outbreak season of thrips. When adult female thrips were most abundant from late June to early July, flowers of both trap plants attracted many thrips. In early July, the number of thrips occurring on tomato flowers, the number of oviposition puncture wounds on tomato fruit, and the percentage of fruits injured by white swelling spot in the mixed culture plot were significantly smaller than in the control plot. These results suggest that the trap plant system using the mixed planting of California poppy and petunia in tomato fields is promising as a useful strategy to control the white swelling spot.
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  • Lethal High Temperatures of Onion Thrips, Thrips tabaci Lindeman (Thysanoptera: Thripidae), and Control of the Thrips with Solar Radiation by Covering the Ground with Film
    Manabu Shibao, Yoshio Inoue, Shinya Morikawa, Hiroshi Tanaka
    Article type: Original Article
    2010 Volume 54 Issue 2 Pages 71-76
    Published: May 25, 2010
    Released on J-STAGE: June 08, 2010
    DOIhttps://doi.org/10.1303/jjaez.2010.71
    JOURNAL FREE ACCESS
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    The lethal high temperature of onion thrips, Thrips tabaci Lindeman was evaluated at selected temperatures and duration combinations under laboratory conditions. T. tabaci adults were killed by exposure to either 42°C for 2 h or 44–50°C for 30 min. The soil temperatures attained under transparent polyvinylchloride film were investigated in an open field at specific times in 2006 in Osaka Prefecture. Maximum temperatures of 44°C or higher were attained from early May to late October at a depth of 2 cm beneath the soil surface. The effect of solar radiation by covering the ground with transparent polyvinylchloride film during the emergence of T. tabaci was investigated in an open field after harvesting the Welsh onions in June and July 2008. The numbers of T. tabaci emergent adults were significantly lower in the solar radiation treatment plots than in the control plots. The results suggests that T. tabaci can be killed with solar radiation by covering the ground with film, and that this control method is effective during the period from early May to late October in Osaka Prefecture.
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  • Nesting Habits of a Pollinator: Osmia orientalis (Hymenoptera: Megachilidae)
    Ikuo Kandori, Mayumi Tamaru, Tomoyuki Yokoi
    Article type: Original Article
    2010 Volume 54 Issue 2 Pages 77-84
    Published: May 25, 2010
    Released on J-STAGE: June 08, 2010
    DOIhttps://doi.org/10.1303/jjaez.2010.77
    JOURNAL FREE ACCESS
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    Osmia orientalis has potential as a crop pollinator and this study examined its curious nesting habits. They were successfully induced to nest in empty snail shells placed in a field (19.8% nesting rate). The nesting rate was higher for larger shells of Euhadra amaliae than for smaller shells of Satsuma japonica. The rate was also higher for intact than damaged shells, but was not affected by the freshness of the shells. As a nesting environment, the insects preferred grass fields rather than denuded areas, spaces adjacent to buildings, or a forest edge. The overall sex ratio of O. orientalis within the shell nests was male biased (59.2% males). The sex distribution within the shell nests was as follows: when O. orientalis nested in S. japonica shells, all cells contained males; when they nested in E. amaliae shells, the innermost and second innermost cells were highly male biased, while the ratio of females increased gradually toward the outermost cells and was highest in the second outermost cells, while the male ratio recovered in the outermost cells. Finally, we discuss the possibility of using and the methods of managing O. orientalis as a crop pollinator.
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