斜紋夜蛾（Spodoptera litura（F.））生物學I.成蟲羽化時刻及交尾時刻

BIOLOGY OF THE TOBACCO CUTWORM (SPODOPTERA LITURA (F.)) I. THE EMERGING AND MATING TIMES OF ADULT

朱耀沂(Yau-I Chu) ； 歐陽盛芝(Sheng-Chih Ou-Yang)

《中華昆蟲》 9卷1期 (1989/03) Pp. ap7+49-57

https://doi.org/10.6660/TESFE.1989007

摘要

本試驗於定溫、定濕條件下，利用人工飼料，經累代飼育的斜紋夜蛾，觀察其羽化及交尾行為，得知在25C、75±5%RH、13°L：11D之條件下，雌蛾的羽化高峰在熄燈直後至其後一小時；雄蛾在熄燈後四至五小時為羽化高峰。將羽化二日齡的雌、雄蛾各一隻配對時；交尾時刻有一個高峰及二個次高峰，即20：00～21：00為高峰，18：00～19：00及23：00～24：00為次高峰：交尾持續時間，最短25分鐘，最長為179分鐘，平均約需72分鐘。若一隻雌蛾配三隻雄蛾時，交尾開始時刻只有自19：00～20：00的一個高峰，較一隻雌蛾配一隻雄蛾時提前一小時，此時雌蛾的交尾率達100%，交尾持續時間由50～260分鐘不等。當三隻雌蛾配一隻雄蛾時，交尾開始時刻高峰可提前二小時，且供試的20組中，只有18隻雄蛾交尾，而60隻雌蛾中，共有24隻交尾，即在18隻交尾雄蛾中，有6隻於一夜中和二隻雌蛾交尾；其交尾持續時間，第一次交尾時間最長為208分鐘，最短為52分鐘；第二次交尾時間最長為58分鐘，最短為24分鐘，平均約為44分鐘，即第二次交尾持續時間明顯地比第一次交尾縮短。

並列摘要

Stock of Spodoptera litura (F.) has been kept at 25C, with relative humidity, 75±5%, and photo period, 13L:11D in the laboratory for the study of biology, i.e. observations of emergence and mating behaviour. In the laboratory, most females emerged at one hour after dark, while male occurred at four to five hours after dark. In the experiment it has been found that the mating time of S. litura might be affected by various sex ratios: 1. Most of mating behaviour occurred between 20:00 and 21:00, some minor peaks have been observed during 18:00-19:00 and 23:00-24:00 for a pair of two days old S. litura. The mating behaviour lasted from 25 to 179 minutes, and the average was 72 minutes. 2. Most of the mating behaviour occurred between 19:00 and 20:00 for one female accompanied wite three males. The copulation rate of female was 100% and mating behaviour lasted from 50 to 260 minutes. 3. As one male placed with three females, most of the mating behaviour occurred between 18:00 and 19:00. The copulation rate of male was 90%, six males mated with two different females in one night. The mating behaviour lasted from 52 to 208 minutes for the first copulation, from 24 to 58 minutes for the second copulation.