Abstract This study was conducted to determine the life history of a solitary, larval-pupal endoparasitoid, Ganaspidium utilis (Beardsley), of Liriomyza trifolii (Burgess) at 25 ± 2oC. The female of G. utilis deposits its eggs in the larvae of L. trifolii. There are four larval instars, which began to develop after L. trifolii pupated. The mean number of progeny produced per G. utilis female was 66.7 ± 18.4 individuals. The sex ratio of the offspring of G. utilis was 1 male: 1.4 females when 50 leafminer larvae were provided daily for parasitization. No significant difference was observed in the mean number of male and female progeny produced.
摘要 本實驗探討在 25 ± 2oC 溫度下，非洲菊斑潛蠅 (Liriomyza trifolii) (Burguess) 寄生蜂 (Ganaspidium utilis) (Beardsley)自幼蟲期到蛹期之寄生現象。雌寄生蜂產卵在非洲菊斑潛蠅幼蟲體內，在斑潛蠅進入蛹期時，G. utilis 便開始孵化及發育，幼蟲期可分辨出四個齡期。雌寄生蜂所產平均子代數為66.7 ± 18.4隻。本實驗中每日提供50隻L. trifolii幼蟲為寄主，結果顯示其寄生蜂子代雄蜂及雌蜂的性別比例是1比1.4。比較子代雌雄平均數之結果顯示兩者無顯著差異。
| Key words: Life history, Ganaspidium utilis, Liriomyza trifolii | | 關鍵詞: 生活史、Ganaspidium utilis、非洲菊斑潛蠅 |
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