偽菜蚜（半翅目：常蚜科）於三種十字花科寄主上之生活史與族群介量

The Life History and Population Parameters of Lipaphis erysimi (Hemiptera: Aphididae) on Three Cruciferous Hosts

偽菜蚜（Lipaphis erysimi（Kaltenbach））為世界性之重要害蟲，對多種十字花科（Brassicaceae）作物造成嚴重危害。本研究於25±0.5℃、相對濕度80±5%、光週期12L: 12D之條件下，以青花菜（Brassica oleracea var. italic）、甘藍（B. oleracea）與蘿蔔（Raphanus sativus）等三種國內常見之十字花科作物進行飼育，探討偽菜蚜於不同寄主上之生活史及族群表現。偽菜蚜之發育時間、繁殖及族群表現等資訊以兩性生命表分析，其幼期之發育時間於青花菜（5.14 day）及蘿蔔（5.14 day）上較短，而繁殖量於青花菜（68.32 offspring/female）及甘藍（77.92 offspring/female）上較高。族群介量方面，於青花菜及甘藍上具有較高的淨繁殖率（R0）（65.97及73.82 offspring/individual）、內在增殖率（r）（0.4041及0.4065 day-1）與終極增殖率（λ）（1.4980及1.5016 day-1），以及較短的平均世代時間（T）（10.37及10.58 day）。整體而言，偽菜蚜於甘藍上之繁殖及族群表現稍高於青花菜，而於蘿蔔上則相對較低，本研究提供此害蟲生活史之重要參考資訊。

Lipaphis erysimi (Kaltenbach) is an important pest worldwide, causing serious damage to a variety of cruciferous crops. In this study, the life history and population parameters of L. erysimi on broccoli, cabbage and radish, were studied at 25±0.5℃, 80±5% RH and 12L: 12D under laboratory condition. The developmental duration of immature stage were shorter on broccoli (5.14 day) and radish (5.14 day), whereas the fecundity was higher on broccoli (68.32 offspring/female) and cabbage (77.92 offspring/female). In terms of population parameters, higher net reproduction rate (R0) (65.97 and 73.82 offspring/individual), intrinsic rate of increase (r) (0.4041 and 0.4065 day-1) and finite rate of increase (λ) (1.4980 and 1.5016 day-1) along with shorter average generation time (T) (10.37 and 10.58 day) were observed on broccoli and cabbage, respectively. In general, the reproduction and population performance of L. erysimi on cabbage was slightly higher than that on broccoli, but relatively lower on radish. This study provides important reference information on the life history of this pest.