Abstract The purpose of this study was to investigate the life cycle of the tortoise beetle, Aspidomorpha miliaris (Fabricius) on 6 Convolvulaceae host plants, including water convolvulus (WC, Ipomoea aquatic), sweet potato (SP, I. batatas), mile a minute vine (MM, I. cairica), common morning glory (CM, I. purpurea), littlebell (LB, I. triloba) and Foully Operculina (FO, Operculina turpethum). At 25oC, the pre-adult development durations of A. miliaris on WC, SP, MM, CM, LB, and FO were 41.4 ± 1.9, 40.6 ± 1.7, 42.00 ± 1.5, 41.0 ± 1.8, 39.8 ± 0.8 and 44.2 ± 2.0 days, respectively. The adult longevity was 123.7 ± 26.6, 127.6 ± 19.5, 121.8 ± 12.9, 86.9 ± 9.8, 111.1 ± 10.5 and 100.1 ± 8.5 days, respectively. The net reproduction rate (R0) was 98.90, 145.87, 132.20, 50.57, 75.60 and 44.97 offspring/individual. The intrinsic rate of population increase (r) was 0.0493, 0.0600, 0.0537, 0.0429, 0.0481 and 0.0343/d. The finite rate of population increase (λ) was 1.0505, 1.0618, 1.0552, 1.0438, 1.0493 and 1.0349 d-1, respectively. The mean generation time (T) was 93.20, 83.1, 91.0, 91.5, 89.9 and 110.9 days. All of the r values were lower than 0.1. Among the host-plants, the cohort that fed on sweet potato had the highest r, R0 and λ; and the ones with the lowest were the insects that fed on common morning glory. At 15 and 20oC the eggs did not hatch. The eggs that were reared at 30oC were able to complete their development, however, the adults could not lay eggs. The development time of the tortoise beetle at 30oC was 35.7 ± 2.1 d with an adult longevity of 33.6 ± 6.1 d.
摘要 本研究主要探討於25oC 恆溫下，大黑星龜金花蟲 (Aspidomorpha miliaris) 取食蕹菜(Ipomoea aquatica)、甘藷 (I. batatas)、槭葉牽牛 (I. cairica)、紫花牽牛 (I. purpurea)、紅花野牽牛 (I. triloba) 以及盒果藤 (Operculina turpethum) 六種不同旋花科植物的生活史，同時也研究本蟲於15、20、30oC 恆溫下取食甘藷葉片的生活史。結果顯示，取食上述六種植物的大黑星龜金花蟲發育時間依序為41.4 ± 1.9、40.6 ± 1.7、42.00 ± 1.5、41.0 ± 1.8、39.8 ± 0.8 及44.2 ± 2.0 天，成蟲壽命依序為123.7 ± 26.6、127.6 ± 19.5、121.8 ± 12.9、86.9 ± 9.8、111.1 ± 10.5及100.1 ± 8.5 天。各處理之發育時間類似，但以取食紫花牽牛葉片的成蟲壽命最短。繁殖率 (R0)依序為98.90、145.87、132.20、50.57、75.60 及44.97 子代，內在增殖率 (r) 依序為0.0493、0.0600、0.0537、0.0429、0.0481 及0.0343 d-1，終極增殖率 (λ) 依序為1.0505、1.0618、1.0552、1.0438、1.0493 及1.0349 d-1，平均世代時間 (T) 依序為93.2、83.1、91.0、91.5、89.92 以及110.9 天。所有的r 值都小於0.1；r、R0 和 λ 值以取食甘藷葉片者最高而取食紫花牽牛葉片者為最低。大黑星龜金花蟲卵於15 及20oC 恆溫環境下無法孵化，僅有30oC 才能孵化並正常發育，但其成蟲無法產下卵。30oC 下發育時間為35.7 (± 2.1) 天，成蟲壽命為33.6 (± 6.1) 天。
| Key words: Aspidomorpha miliaris, life history, Convolvulaceae species | | 關鍵詞: 大黑星龜金花蟲、生活史、旋花科植物 |
|