Field evaluation of a novel synthetic odour blend and of the synergistic role of carbon dioxide for sampling host-seeking Aedes albopictus adults in Rome, Italy

Particle and Fibre Toxicology

Willem Takken²  Alessandra della Torre¹  Beniamino Caputo¹  Niels O Verhulst²  Frans Jacobs²  Marco Pombi¹ 

[1] Dipartimento di Sanità Pubblica e Malattie Infettive, Università di Roma “Sapienza”, Rome, Italy;Laboratory of Entomology, Wageningen University and Research Centre, Wageningen, The Netherlands

关键词: Synergism;    CO2;    Odour bait;    Attraction;    BG-sentinel trap;    Adult collections;    Mosquito;    Aedes albopictus;   

Others  :  1148546
DOI  :  10.1186/s13071-014-0580-9

 received in 2014-08-08, accepted in 2014-11-28,  发布年份 2014

【 摘 要 】

Background

Despite the expanding worldwide distribution of Aedes albopictus and its increasing relevance as arboviral vector, current methods to collect adult specimens are not optimal. Improved approaches are thus needed to monitor their density and pathogen infections, and to establish baseline data for control interventions. A widely used device is the BG-Sentinel (BG-trap) which mostly targets host-seeking females attracted by release of CO₂ and/or a synthetic odour blend (the BG lure). We compared the attractiveness of this blend to that of the Mbita (MB5) lure, a new synthetic blend of proven efficiency in attracting Afrotropical malaria vectors, and evaluated the additional effect of CO₂ to the two odour baits.

Findings

We carried out 6x6 Latin square experiments in two Ae. albopictus-infested areas in Rome, baiting the BG-traps as follows: CO₂, BG lure, MB5 lure, BG lure + CO₂, MB5 lure + CO_2, no bait. CO₂ was derived from yeast-fermented sugar. Overall, 949 females and 816 males were collected. Baited traps collected significantly more females than unbaited ones. Traps baited with either lures in combination with CO₂ were more effective than those baited with CO₂ alone. No significant differences were observed in female captures between traps baited with any of the two lures, nor between the two lures, independently from the addition of CO₂. The use of BG lure + CO₂ significantly increased males catches compared to unbaited traps.

Conclusions

The results suggest a broad significance of the MB5 lure for sampling medically important mosquito species and highlight the high efficacy of the combination of lures + CO₂ for female Ae. albopictus and of BG lure + CO₂ for males, leading to consider CO₂ as an essential additional cue for the sampling of this species.

【 授权许可】

   
2014 Pombi et al.; licensee BioMed Central.

【 图 表 】

Figure 1.

Figure 2.

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