東方果實蠅為我國最重要之果樹害蟲，防治上主要使用0.02 % 賜諾殺濃餌劑 (香兒寶) 及甲基丁香油滅雄法，然而已有許多有關害蟲對賜諾殺產生抗性之報導，此外迄今尚無一種有效果實蠅雌蟲誘引劑。故本研究主要目的為探討賜諾殺濃餌劑有效成分 (賜諾殺) 之穩定性以及果實蠅誘雌劑。HPLC 結果顯示，賜諾殺濃餌劑於溫度 20~40°C 及 pH 5~9下三週對其有效成分並無顯著影響。但在 UVC 照射下，不論是賜諾殺濃餌劑所含賜諾殺或賜諾殺標準品，皆有隨照射時間增加而產生光解的現象，此情形又以標準品更為明顯。添加化學藥品 (如碳酸銨或甲基丁香油) 會加速賜諾殺濃餌劑有效成分光解；但加入醋酸銨後，除了能增加對果實蠅誘引效果外，還有助於賜諾殺之光穩定性；進一步實驗亦發現賜諾殺濃餌劑所含賜諾殺於酸性環境中較為穩定，顯示pH 值在賜諾殺光解作用中扮演重要角色。此外，發現果實蠅雄蟲正己烷萃取物對於果實蠅雌蟲具良好誘引效果，利用固相微萃取法 (Solid-phase microextraction, SPME) 及GC-MS 鑑定分析，顯示farnesene可能為果實蠅性費洛蒙成分之一，farnesene對果實蠅雌雄蟲均有三成以上誘引力，而α-pinene最具誘雌效果，誘引力可達 35 %。以複成分配方進行誘引試驗，發現複成分 (Farnesene/Limonene/α-Pinene) 較單成分對果實蠅更具誘引性 (43.3 %) (P>0.05)，推測東方果實蠅之性費洛蒙可能不只單一成分。至於雄蟲所釋放費洛蒙是否具有產卵誘引性則有待進一步確認。

The oriental fruit fly, Bactrocera dorsalis (Hendel), is one of the major fruit pests in Taiwan. Current emphasis in area-wide management program use the spinosad-based fruit fly bait (GF-120) or methyl eugenol combined with naled to attract and kill oriental fruit fly. However, spinosad-resistance have been recorded in some pests and no effectiveness of female-based attractant have been developed. The aims of this thesis are to investigate the stability of spinosad and to identify the potential attractants for female oriental fruit fly. The HPLC results showed that the active ingredient of GF-120 was stable either at 20-40°C or at pH 5-9 for three weeks. However, both spinosad standard and GF-120 were rapidly degraded under the condition of UVC irradiation, especially in spinosad standard. The results also showed that either ammonium carbonate or methyl eugenol might enhance the degradation of GF-120, while ammonium acetate could effectively increase the attractive efficiency by decreasing the photolysis of GF-120. Furthermore, the photodegradation rate of GF-120 was slower in acidic aqueous solution than in basic condition, indicating the matrix pH may play an important role in photolysis of GF-120. In different experiments, the hexane extract of male flies exhibited attractive activity toward female flies. The components identified by SPME/GC-MS to be the candidate for the sex pheromone is farnesene. Further analysis showed that farnesene could attract both female and male flies by above 30 %, and that α-pinene attracted to female flies with 35 % attraction rate. Further experiments found the multiple components (Farnesene/Limonene/α-Pinene) were more attractive than single component (P>0.05), suggesting the multiple components of sex pheromone of oriental fruit fly. Whether the male-released attractant also showed oviposition preference for female flies need further investigation.

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