The predatory African weaver ant, Oecophylla longinoda (Hymenoptera: Formicidae) effectively control pests by predation as well as by semiochemicals which influence the behaviour of certain species. Here, we investigated and compared the role of O. longinoda semiochemicals on the oviposition responses of two major fruit fly (Diptera: Tephritidae) species of mango; the invasive species, Bactrocera dorsalis, endemic to Southeast Asia and the African native species, Ceratitis cosyra. We carried oviposition choice assays with ant-exposed and unexposed mangoes, using extracts of ant whole body and body parts. Our results show that the flies avoided and laid fewer eggs on weaver ant-exposed than unexposed mango peel discs. Subsequent assays with mango discs treated with whole body extracts in hexane, ethyl acetate, methanol and water reduced oviposition responses in C. cosyra. Moreover, discs treated with abdominal extracts in hexane and water reduced egg laying in B. dorsalis. whereas hexane, methanol and water extracts of the abdomen reduced oviposition in C. cosyra. Additionally, mango discs treated with extracts of exercised Dufour’s and poison gland in hexane elicited stronger oviposition reduction responses in C. cosyra than in B. dorsalis. These results suggest that ant gland compounds play a role in the oviposition avoidance behaviour of both fruit fly species. Moreover, both African fruit fly species and invasive Asian species, are repelled by Oecophylla longinoda semiochemicals implying that B. dorsalis experienced similar evolutionary pressures, and reacting to similar cues, from Oecophylla smaragdina in Asia as did C. cosyra from Oecophylla longinoda in Africa.

掠食性非洲织布工蚂蚁Oecophylla longinoda（膜翅目：Formicidae）通过捕食以及影响某些物种行为的化学信息素有效地控制了害虫。在这里，我们调查和比较了长颈oda蛇的化学信息素对芒果两个主要果蝇（双翅目：蝶形科）的产卵反应的作用。入侵种，背果小实蝇（Bactrocera dorsalis），东南亚特有种和非洲本地种，Ceratitis cosyra。我们使用蚂蚁全身和身体部位的提取物进行了蚂蚁暴露和未暴露芒果的产卵选择分析。我们的结果表明，与未暴露的芒果皮盘相比，在避免与织布机接触的苍蝇上蝇蝇少，产卵量少。随后用芒果圆片在己烷，乙酸乙酯，甲醇和水中进行全身提取物处理后的测定降低了C. cosyra的产卵反应。而且，用己烷和水中的腹部提取物处理过的椎间盘可减少背侧双歧杆菌的产卵量。而腹部的己烷，甲醇和水提取物减少了C. cosyra的产卵。此外，用运动的杜福氏提取物和毒腺在己烷中的提取物处理过的芒果圆盘在C. cosyra中引起更强的产卵减少反应比背实芽孢杆菌还要多。这些结果表明，蚂蚁化合物在两种果蝇的避卵行为中均起作用。此外，无论是非洲果蝇物种和侵入亚洲种，被击退Oecophylla longinoda化学信息素暗示桔小实蝇经历了类似的进化压力，以及反应类似的线索，从黄猄蚁亚洲象C. cosyra从Oecophylla longinoda在非洲。