Interactive Effects of l-Octen-3-ol and Carbon Dioxide on Mosquito (Diptera: Culicidae) Surveillance and Control

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Abstract
Responses of natural populations of biting Diptera were studied at Everglades National Park, Fla., to three levels (0, 3.0, and 41.1 mg/h) of l-octen-3-ol (octenol), four levels (0, 20, 200, and 2,000 ml/min) of carbon dioxide (CO2), and their combinations. Catches of mosquitoes (Aedes taeniorhynchus (Wiedemann), Culex [ Melanoconion ]) spp., Cx. nigripalpus Theobald, and Wyeomyia spp.) and one tabanid ( Diachlorus ferrugatus (F.)) were affected significantly by CO2 and octenol. Significantly greater numbers of all taxa were collected as the level of CO2 was increased. The 3.0-mg/h release rate of octenol alone resulted in increased trap catches relative to no bait for all taxa except Cx. (Melanoconion) spp., whereas the 41.1-mg/h release rate alone generally reduced trap catches relative to either no bait or 3.0 mg/h octenol. The effect of CO2 and octenol was additive for Cx. (Melanoconion) spp. and D. ferrugatus and synergistic for Ae. taeniorhynchus. Six octenol-supplemented CO2 treatments produced mixed results for Cx. nigripalpus.

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