Summary
Epiphyll growth on leaves of the grapefruit Citrus paradisi and the understory cyclanth Cyclanthus bipartitus repelled the fungus-growing, leafcutter ant Atta cephalotes from harvesting leaves of these tropical plants. Experimental removal of epiphylls from leaves resulted in 2–3 times more herbivore damage by leafcutter ants as compared to matched leaves with epiphylls. Because of the protection from herbivore damage, host plants may derive a partial fitness benefit from association with epiphylls.
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Mueller, U.G., Wolf-Mueller, B. Epiphyll deterrence to the leafcutter ant Atta cephalotes . Oecologia 86, 36–39 (1991). https://doi.org/10.1007/BF00317386
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DOI: https://doi.org/10.1007/BF00317386