Learning and memory in the mosquito Aedes aegypti shown by conditioning against oviposition deterrence |
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Authors: | Kaur J S Lai Y L Giger A D |
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Affiliation: | Environmental Health Institute, National Environment Agency, Singapore. Jaspal_Sunita_Kaur@nea.gov.sg |
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Abstract: | Oviposition site choice by female mosquitoes, Aedes aegypti (L) (Diptera: Culicidae), was affected by rearing them in water treated with 0.016% of the repellent Mozaway trade mark containing citronella and neem. Given a choice between a bowl of repellent-treated and a bowl of untreated water, Ae. aegypti reared in untreated water strongly preferred to oviposit on the clean water (93-98%) instead of repellent-treated water. This demonstrates effective deterrence of oviposition by dilute Mozaway trade mark. Those reared in repellent-treated water were less deterred: 38-46% of their eggs were laid on the repellent-treated water and 54-62% on the clean water. Evidently the female mosquitoes reared in repellent-treated water were conditioned against oviposition site deterrence, as shown when choice tests were conducted 6 days post-emergence from the treated water. This demonstrates learning and memory in the mosquito Ae. aegypti, with implications for dengue vector surveillance and control. |
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Keywords: | Aedes aegypti citronella conditioning dengue deterrence insect repellent learning memory mosquito behaviour neem oviposition site choice ovitrap vector control vector surveillance |
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