斜紋夜蛾（Spodoptera litura （F.））生物學II.成蟲壽命及交尾能力

BIOLOGY OF THE TOBACCO CUTWORM (SPODOPTERA LITURA (F.)) II. The Longevity and Mating Ability of Adult

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

《中華昆蟲》 10卷1期 (1990/03) Pp. ii+27-36

https://doi.org/10.6660/TESFE.1990002

摘要

以人工飼料於生物生長箱（25C，75±5％ RH，13L：11D）的條件下，累代飼育斜紋夜蛾（Spodoptera litura（F.）），調查成蟲配對對壽命及交尾能力的影響。結果顯示未交尾之雄蛾的平均壽命為13.74天，雌蛾為15.02天，已交尾雄蛾之壽命為11.96天，雌蛾為8.10天。雄蛾一生中其交尾次數最多者達13次，平均為6.3次；以八日齡的交尾率為最高；配對時成蟲到了五日齡，所有的雄蛾至少完成一次交尾。雌蛾一生中最多交尾3次，半數的雌蛾交尾1次；配對時成蟲到了五日齡，所有雌蛾皆產過卵。雌、雄蛾連續配對時，在同一隻雌蛾體內最多可以發現八個精胞，供試雌蛾仍以具有一個或二個精胞的佔多數；配對日數愈長，則接受之精胞數愈多。將不同日齡雌蛾與二日齡雄蛾配對時，有44％雌蛾在羽化當天就有接受精胞之能力，三日齡時達最高峰，其後有急速下降的趨勢。以不同日齡雄蛾配對時，雄蛾於羽化次日才具有交尾能力，至八日齡時達最高峰，其後下降但比雌蛾緩慢。以同日齡雌、雄蛾配對時，其交尾曲線介於不同日齡雌、雄蛾配對曲線之間。

並列摘要

The adult of tobacco cutworms (Spodoptera litura (F.)) which reared with artificial diet under growth chamber (25C, 75±5% RH, 13L:11D) conditions in their larval stages were used in the study works. The results showed that average longevity of male and female kept alone were 13.74 and 15.02 days, respectively. When male paired with 2 day-aged females every day, the average longevity of male was 11.96 days. The longevity of female which paired with 2 day-aged male every day was 8.10 days. The mating frequency of male was 0 to 13 and 6.3 in average during its adult stage. Till 5th day from the adult emergence, all males copulated at least once. The mating frequency of female was 3 times at most. While among 50 of tested females, 25 individuals accepted a single spermatophore in her corpus bursae. All females oviposited fertilized egg mass till 5th day. When one 2 day-aged female was continuously paired with same aged old male through her adult stage, at most 8 spermatophores were found in her corpus bursae. 1 to 2 spermatophores per female was frequency. There was a trend that the number of spermatophore in corpus bursae increased as the prolongation of the pairing duration. When newly-emerged female was paired with 2 day-aged male, 44% of female accepted spermatophore. The spermatophore acceptability of female became a peak on the 3rd day from her emergence. Then 64% of female moth accepted spermatophore. After that day, the acceptability degraded markedly. Male moth could copulated with female since next day of emergence, and become peak on the 8th days. Then 78% of male copulated with 2 day-aged female. The degrading tendency of copulation in male was more slow than that of female. When the copulating couple was made with same aged old male and female. The curves of .t he copulated couple stood between the curves which obtained by constant 2 days-aged spouse.