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1 December 2013 Evaluation of a CO2-Free Commercial Mosquito Attractant to Capture Triatomines in the Laboratory
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Efforts have been made to develop vertebrate odor-based attractants to lure hematophagous triatomines into traps. However, more work is needed to reach a practical, cheap, and efficient odor lure. We carried out attraction and capture tests in a dual-choice olfactometer and a pitfall trap. Here we report that a three-component, CO2-free, synthetic blend of vertebrate odor (consisting of ammonia, L( ) lactic acid and hexanoic acid, and known as Sweetscent®) significantly induces 3rd-instar Rhodnius prolixus and Triatoma infestans nymphs to fall into the test capture-tube of the olfactometer. Blend constituents presented singly or in two-component blends did not evoke a response and, therefore, we propose that the insects respond specifically to the three-component blend in a synergistic way. When tested in a pitfall trap in an experimental arena, this blend induced capture in 37.5% of the lured traps, whereas 9% of the nymphs tested were captured in a single night. No insects were captured in control traps. Our work represents a proof-of-concept regarding capture of triatomines using host odor-based, CO2-free synthetic mixtures as lures for pitfall traps. CO2-free lures are more practical for field work than natural or CO2-containing synthetic blends.

F. Guidobaldi and P.G. Guerenstein "Evaluation of a CO2-Free Commercial Mosquito Attractant to Capture Triatomines in the Laboratory," Journal of Vector Ecology 38(2), 245-250, (1 December 2013).
Received: 15 February 2013; Accepted: 1 April 2013; Published: 1 December 2013

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