日本応用動物昆虫学会誌
Online ISSN : 1347-6068
Print ISSN : 0021-4914
ISSN-L : 0021-4914
56 巻 , 4 号
選択された号の論文の17件中1~17を表示しています
総説
原著
  • 尹 丁梵, 野村 昌史, 石倉 聡
    原稿種別: 原著
    2012 年 56 巻 4 号 p. 151-156
    発行日: 2012/11/25
    公開日: 2013/01/05
    ジャーナル フリー
    We aimed to clarify the pulse conditions of a yellow LED that can be pulsed at the high speed required to control noctuid moths without suppressing the blooming of chrysanthemum. We used a lemon-yellow LED (central wavelength: 571 nm) of similar wavelength to yellow fluorescent light, with an intensity of 20 mW/m2 and pulsed-LED light period of 20 ms. We measured the flight activity of adult Helicoverpa armigera (Hübner) under various light to dark period ratios of the LED pulse: 20 ms : 0 ms (continuous lighting), 20 ms : 40 ms, 20 ms : 80 ms, 20 ms : 160 ms, 20 ms : 400 ms and these were compared with dark conditions 0 ms : 0 ms without illumination, using an actograph system. As a result, Helicoverpa armigera became accustomed to the LED lighting conditions over time and the number of flight activities gradually increased in unmated females in 20 : 0, 20 : 160 and 20 : 400 groups and in unmated males in 20 : 0 and 20 : 400 groups over one day. However, in the 20 : 40 and 20 : 80 groups, Helicoverpa armigera adults, either unmated females or males, did not become accustomed, but flight activity was clearly controlled over five continuous days. It was found that the flight of adult moths was strongly suppressed under the conditions of 20 : 40 ms and 20 : 80 ms pulsed-LED light.
  • 齊藤 美樹, 高久 元
    原稿種別: 原著
    2012 年 56 巻 4 号 p. 157-167
    発行日: 2012/11/25
    公開日: 2013/01/05
    ジャーナル フリー
    Native predatory mites (Acari: Gamasina) and saprophagous arthropods—an acarid mite Tyrophagus similis Volgin (Acari: Acaridae) and springtails (Entognatha: Collembola) —were collected from spinach-cultivated soils of 6 greenhouses located in Hokkaido at 7–10 day intervals from April to September in 2010 and 2011. Of the 16 species of predator mites collected, Ascidae sp.1, Ascidae sp.2, Hypoaspis (Gaeolaelaps) praesternalis Willmann, Macrocheles sp., Cycetogamasus diviortus (Athias-Henriot), and Parholaspulus alstoni Evans most frequently occurred. Positive correlations were observed between the population dynamics of H. praesternalis and T. similis, and that of Macrocheles sp. and springtails. Therefore, we suggest that H. praesternalis and Macrocheles sp. prey on the saprophagous arthropods T. similis and springtails, respectively.
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