Floral scents repel potentially nectar-thieving ants

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Floral volatiles controlling ant behaviour (2009, background): “Most recently, Junker & Blüthgen (2008) used four-way olfactometric assays with 30 flower species, excluding any possibility of contact chemoreception mediating repellence and with cut stalks immersed in water to minimize contaminating volatiles from wounds.”
Loss and gains in ant–plant interactions mediated by extrafloral nectar: fidelity, cheats, and lies (2016, background): “Detailed analyses revealed that flower chemicals, rather than nectar, were responsible to deter ants from visiting flowers (Junker and Blüthgen 2008), demonstrating that the same floral compounds might both deter ants and attract pollinators (e.g. linalool).”
A Sticky Affair: Resin Collection by Bornean Stingless Bees (2009, background): “It is likely that the freshly collected resin may serve best for nest defense because fresh resin still contains monoterpenes (Gershenzon & Dudareva 2007), which have been shown to effectively repel ants and other invertebrates (Eisner et al. 1986, Junker & Blüthgen 2008).”