Attraction versus capture II: efficiency of the BG-sentinel trap under semifield conditions and characterizing response behaviors of male Aedes aegypti (Diptera: Culicidae)

Amos, Brogan A., Ritchie, Scott A., and Cardé, Ring T. (2020) Attraction versus capture II: efficiency of the BG-sentinel trap under semifield conditions and characterizing response behaviors of male Aedes aegypti (Diptera: Culicidae). Journal of Medical Entomology, 57 (5). pp. 1539-1549.

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Abstract

Aedes aegypti (L.) is an important vector of viruses causing dengue, Zika, chikungunya, and yellow fever and as such presents a serious threat to public health in tropical regions. Control programs involving 'rear and release' of modified male Ae. aegypti are underway and require effective trapping methods for surveillance of both the released insects and the impacted wild mosquito population. The BG-Sentinel trap (BGS) is widely used in Ae. aegypti surveillance but its level of efficiency, that is, what proportion of the mosquitoes encountering the trap are captured, is unknown. This is especially true for male mosquitoes, the behavior of which is incompletely understood. We tested the efficiency of two versions of the BGS for capturing male Ae. aegypti under semifield conditions with and without CO2 and a human skin odor mimic lure and with these baits combined. A navyblue BGS trap emitting CO2 and a human skin odor mimic captured 18% of the released male Ae. aegypti, with a capture efficiency of 9 % (of the total encounters with the trap). Male Ae. aegypti had multiple encounters with the BGS that did not result in capture; they crossed over the trap entrance without being captured or landed on the sides of the trap. Swarming behavior around the BGS was also recorded, even when only a visual cue was present. Understanding male Ae. aegypti behaviors during an encounter with the BGS can inform improvement of trap design and therefore capture efficiency for surveillance in control programs.

Item ID: 66722
Item Type: Article (Research - C1)
ISSN: 1938-2928
Keywords: Aedes aegypti, Biogents Sentinel trap, Male mosquito, Trap efficiency
Copyright Information: Published by Oxford University Press on behalf of Entomological Society of America 2020. 1539
Funders: U.S. Centers for Disease Control and Prevention, Pacific Southwest Regional Center of Excellence for Vector-Borne Diseases
Date Deposited: 05 May 2021 00:27
FoR Codes: 42 HEALTH SCIENCES > 4202 Epidemiology > 420203 Environmental epidemiology @ 100%
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