作者：王文哲　劉玉章

　　 在食物引誘劑試驗中，選取黃豆蛋白腖、乙酸乙酯、正乙酸丁酯、乙烯、糖蜜5 種物質及水等，混配成 16 種混合引誘物，於小網室 ( 長 206 ×寬 95 ×高 152 cm) 內進行對瓜實蠅 (Bactrocera cucurbitae (Coquillett)) 成蟲引誘效果之測試，結果以黃豆蛋白腖加乙酸乙酯 (BS+EA) 對成蟲的引誘率最高，達 75.8% 。黃豆蛋白腖添加不同比例之乙酸乙酯，亦以 1 ： 1 比例下的引誘效果最佳，其引誘率隨乙酸乙酯濃度之增加而降低。在相同空間下，引誘劑對不同密度成蟲之誘殺效果，以 40 對密度下的引誘效果最佳。在引誘劑中分別添加不同種類殺蟲劑，結果以添加 2.8% 畢芬寧乳劑的誘殺效果最佳，誘殺率為 39.2% 。引誘劑之有效引誘期以第一天之引誘效果為最強，但其高效引誘時間僅能維持 2 天。

關鍵字： 瓜實蠅、黃豆蛋白腖、引誘劑 。

　　 Sixteen mixtures made from five major substances, the bacto-soytone, ethyl acetate, n-butyl acetate, and molasses were used as food attractants in this study. These mixtures were selected and tested in the screening house (L206× H95× W152 cm) in order to find out the most attractive attractant for the melon fly (Bactrocera cucurbitae (Coquillett)). The result revealed that the most effective attractant for both female and male flies was the mixture of bacto-soytone and ethyl acetate (BS+EA) having high attractiveness in 75.8%. The best mix ratio of bacto-soytone and ethyl acetate was 1:1. The attractiveness of this mixture to the adult flies reached the highest when the fly density was 40 pairs in a certain space. When the attractant (BS+EA, 1:1) poisoned with different insecticides, 2.8% bifenthrin E.C. showed the most effective attractiveness to the flies in 39.2%. However, the duration of effectiveness of this attractant persisted only two days at the high percentage of attractiveness level.

Key words: Bactrocera cucurbitae, bacto-soytone, attractant.