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The presence of an alternative food source changes the tending behavior of the big-headed ant, Pheidole megacephala (Hymenoptera: Formicidae) on Dysmicoccus brevipes (Homoptera: Pseudococcidae)

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Abstract

The mutualistic association between ants and hemipterans is often facultative and can be affected by the availability of other food sources. In the present study we tested whether the tending behavior of the big-headed ant, Pheidole megacephala (Fabricius), had a negative impact on the pink pineapple mealybug, Dysmicoccus brevipes (Cockerell), when alternative food sources: (1) sugar solution, (2) purified water + mealworms and (3) sugar solution + mealworms versus with purified water (control) were provided to the ant colonies. We found that the frequency of ant tending on D. brevipes decreased when ants were provided with alternative food sources. However, we did not see any aggressive behaviors and predation of ants on D. brevipes. Also, the survival of D. brevipes was not different among food condition treatments. These results suggest that the decreased tending frequency of ants can lead to the decline in ant protection service to mealybugs.

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Acknowledgements

This study is supported in part by KAKENHI (16K14865, 16H04846, 15H04425, 15H02652, 25660266).

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Correspondence to Aye T. Win.

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Win, A.T., Kinoshita, T. & Tsuji, K. The presence of an alternative food source changes the tending behavior of the big-headed ant, Pheidole megacephala (Hymenoptera: Formicidae) on Dysmicoccus brevipes (Homoptera: Pseudococcidae). Appl Entomol Zool 53, 253–258 (2018). https://doi.org/10.1007/s13355-018-0553-0

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  • DOI: https://doi.org/10.1007/s13355-018-0553-0

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