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1 June 2018 Controlling Culex pipiens: Antagonists are More Efficient than a Neonicotinoid Insecticide
Alvine Larissa Meyabeme Elono, Kaarina Foit, Sabine Duquesne, Matthias Liess
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Abstract

Species vulnerability to pesticides depends on physiological sensitivity, the potential to recover, and the ecological context. We assessed the vulnerability of the mosquito Culex pipiens to a repeated treatment with thiacloprid in outdoor microcosms with and without antagonists (competitive and predatory invertebrates). Microcosms were treated repeatedly (three times) with thiacloprid at a concentration of 0.1, 1, or 10 µg/liter. In microcosms without antagonists, the abundance of Cx. pipiens larvae decreased moderately after the second and the third exposures to 10 µg/liter thiacloprid. In microcosms with antagonists, the abundance of Cx. pipiens larvae declined to approximately zero in the control group and the low concentration treatments during the five weeks of observation. By contrast, the abundance of Cx. pipiens larvae temporarily increased at 10 µg/liter thiacloprid after the second and third contamination. We explained this positive effect on the development of Cx. pipiens because of the decrease in competition due to the elimination of sensitive antagonists combined with the high recovery potential of Cx. pipiens. Based on these results, natural antagonists must be supported for the sustainable control of mosquitoes.

Alvine Larissa Meyabeme Elono, Kaarina Foit, Sabine Duquesne, and Matthias Liess "Controlling Culex pipiens: Antagonists are More Efficient than a Neonicotinoid Insecticide," Journal of Vector Ecology 43(1), 26-35, (1 June 2018). https://doi.org/10.1111/jvec.12279
Received: 27 June 2017; Accepted: 4 October 2017; Published: 1 June 2018
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KEYWORDS
competitors
Culex pipiens
invertebrate taxa
mosquito control
predators
Thiacloprid
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