交尾對外米綴蛾（Corcyra cephalonica（Stainton））產卵量的影響

本研究重點在探討交尾對外米綴蛾（Corcyra cephalonica（Stainton））產卵量的影響。先將本種卵粒置於底部含碎粒蓬萊糙米的廣口瓶內，移至30 ± 1℃，70 ± 5% RH，12L：12D的生長箱中累代繁殖。然後分組試驗，調查交尾雌蛾和處女雌蛾的產卵前期、產卵期及產卵量，以及交尾一次和交尾多次雌蛾的產卵量、孵化率及壽命。結果得知外米綴蛾已交尾雌蛾的產卵前期和產卵期均較處女雌蛾短，但已交尾雌蛾的產卵量為477.7 ± 12.1粒，多於處女雌蛾的355.8 ± 12.6粒。已交尾雌蛾於第2日齡而處女雌蛾於第4日齡時達產卵高峰。供試雌蛾在11日齡以前，已交尾雌蛾每日的累積日產卵率高於處女雌蛾，已交尾雌蛾的累積日產卵率於第5日齡時達93.7%，但處女雌蛾至第7日齡時才達到80.9%。交尾一次雌蛾產卵量為400.8 ± 12.6粒，少於交尾多次雌蛾的465.0 ± 12.1粒，但兩者的卵孵化率和雌蛾壽命並無顯著差異。

關鍵字

外米綴蛾Corcyra cephalonica ；交尾；產卵量；卵孵化率；壽命

並列摘要

The focus of this study was to investigate the effect of mating on fecundity of the rice moth (Corcyra cephalonica (Stainton)). The eggs of this species were first reared in the jars containing crushed japonica rice brown rice and in a growth chamber at 30 ± 1℃,70 ± 5% RH, with a 12L:12D photoperiod (The light was turned on at 06:00 and off at 18:00) for rearing multiple generations. The group experiments were conducted to investigate the pre-oviposition period, oviposition period, and fecundity of mated and virgin females, fecundity, egg hatchability and longevity of mated once and multiple females. The results indicated that mated females' pre- and oviposition periods were shorter than virgin ones. Still, the fecundity of the mated female was 477.7 ± 12.1 eggs, more than that of the virgin female 355.8 ± 12.6 eggs. The mated female reached the peak of daily fecundity at the 2 days of age, and the virgin females at the 4 days of age. Before the 11 days of age, the cumulative daily oviposition rate of the mated female was higher than the virgin female. The cumulative daily oviposition rate of the mated females reached 93.7% at the 5 days of age, but the 7 days of age virgin females were only 80.9%. The fecundity of mated once female was 400.8 ± 12.6 eggs, which was less than 465.0 ± 12.1 eggs in mated multiple females. Still, the two treatment groups had no significant difference in egg hatchability and female longevity.