- 作者： 姚安莉; 李文蓉
- 作者服務機構： 中央研究院動物研究所
- 中文摘要：
臺灣東部地區花蓮、臺東兩縣東方果實蠅 (Dacus dorsalis Hendel) 全年棲?密度消長情形
及其寄生蜂種類和寄生情形的調查工作，始於一九七七年九月迄於一九七八年八月。花蓮地區擇
定9個試驗果園，臺東地區擇定4個試驗果園。調查方法有二：(1)誘殺法，即是以含毒甲基丁
香油為雄性誘引劑誘殺田間雄性果實蠅，每個試驗果園懸掛2只誘殺器，每週定期收集並記錄
誘得蟲數。(2)落果調查，於擇定試驗果園中逢機選取果樹，定期收集落果，取同室內，觀察果實
蠅幼蟲在果實內發生情形。由研究中發現果實蠅田問棲拿密度消長情形與寄主果實種類有關，且
與其嗜好寄主果實成熟期有關。由誘殺器誘得雄蟲中 99.1 ％ 為D. dorsalis，其餘的 0.9％ 為
D. cilifer, D. cucurbitae 及 D. nubilus。由取回落果在室內觀察僅發現一種寄生蜂，即 Biosteres
（＝Opius) longicaudatus var. formosanus，寄生率為0.2-2.8%。
x - 英文摘要： This study is concerned with the fieldpopulation density of the oriental fruit fly,Dacus dorsalis Hendel, and the species andparasitization of its parasite in eastern Taiwan.Data were obtained from 9 plots of fruit-farmin Hua-lien, and 4 plots in Tai-tung duringSeptember 1977-August 1978. Two researchstrategies were followed: (1)Two traps baitedwith poisoned methyl eugenol were set-up ineach plot to catch male fruit flies. Thesetraps were inspected at weekly intervals andthe trapped flies were counted. (2) All of thefallen fruits from under randomly selected treesin each plot were collected periodically. Theextent of infestation was determined. Thepopulation density of the oriental fruit flies wasfound to be related to (1) the ripening seasonsof the fruits, and (2) the types of fruits grown.Among those males caught by the baited traps,99.1% were D. dorsalis; three other species, D.cilifer, D. cucurbitae, and D. nubilus made upthe other 0.9%, Larval samples obtained fromthe collected fruits were observed for parasitiza-tion. The parasitic rate was found to be 0.2-0.8%. This parasite was Biosteres (=Opius)longicaudatus var. formosanus, and no otherspecies were discovered in the field.
- 中文關鍵字： --
- 英文關鍵字： --
