2種ウンカの羽化リズム
1990 年 34 巻 1 号 p. 77-78
詳細
1990 年 34 巻 1 号 p. 77-78
Rhythms of imaginal ecdysis of two rice planthoppers Nilaparvata lugens and Laodelphax striatellus were studied at a constant temperature of 25°C. The two species showed clear rhythms under the influence of diel cycle illuminations. N. lugens usually emerged within the first two hr of the photophase under 16L-8D photoperiod and within the last two hr of the scotophase under 10L-14D photoperiod. The emergence rhythms continued in a clear circadian manner after being transferred to continuous light conditions. The rhythms were well synchronized between males and females.
