斜紋夜蛾（Spodoptera litura （F.））生物學IV、雌蛾連續配對三日時的交尾和產卵能力

Biology of the Tobacco Cutworm (Spodoptera Litura (F.)) IV. Copulation and Oviposition of Females Paired for Three Days

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

《中華昆蟲》 11卷1期 (1991/03) Pp. v+39-47

https://doi.org/10.6660/TESFE.1991005

摘要

以人工飼料在25℃，75±5%RH，13L：11D光週期之恆定條件下，累代飼育斜紋夜蛾，取二日齡雌蛾與三日齡雄蛾配對，每日更新三日齡雄蛾及糖水，如此連續觀察三天，得知在50對供蛾中，三日內交尾一次的雌蛾有21隻，交尾二次及三次者各有22隻及5隻。第一次交尾開始時刻高峰在19:00~20:00時，第二次交尾高峰在隔一日之2:00~3:00時，第三次交尾高峰則在4:00~5:00時，即交尾時刻高峰隨交尾次數之增加而延遲。交尾持續時間平均約需74分鐘，唯第二次交尾時明顯地縮短時間。產卵開始時刻高峰多分布於21:00~24:00時；產卵持續時平均約為58分鐘，並不受交尾次數之影響；但雌蛾一夜間的產卵數隨交尾次數之增加而略微減少。此外，雌蛾一生中的總產卵數，由交尾一次的2815.61±1170.42粒增至交尾三次的3772.60±1193.70粒。日平均孵化率，無論交尾一次至三次，皆在66.47~82.37%之間，無顯著差異，故認為連續多次交尾對產卵數略有增加的效果。

關鍵字

斜紋夜蛾 ； 交尾 ； 產卵

並列摘要

Tobacco cutworm (Spodoplero lilura(F. )).larvae were reared with artificial diet under constant condition at 25°C, 75 ± 5%RH, and 131: 110 photoperiod. After adult emergence, each female was paired with one male for three days. Oviposition capacity and egg hatchability were then recorded. After each female's death , in order to determine her copulation frequency , the corpus bursae was dissected and the number of spermarophores in it were counted. Among tested 50 females, 21, 22, and 5 females were found to have copulated once, twice, and thrice respectively. The peaks of copulation activity were not constant from day to day. At first, it occurred between 19:00-20:00, then a day later between 02:00-03 :00, and finally between 04:00-05:00. The average duration of the first copulation was 74 min., while it shortened in the second copulation. Peaks of oviposition activity of once , twice, and thrice mated females were between 22:00-23:00 ,21:00-22:00, and 23:00-24:00 , respectively. It took an average about 58 min . to deposite one egg mass. Mating fequency did not influence the duration or time of oviposition , or egg hatchability . However, it affected the total number of eggs deposited. The average numbers of eggs deposited were 2815.61 for once-copulated and 3772.60 for thrice-copulated females.

並列關鍵字

Spodoptera litura ； copulation ； oviposition