New traps for the capture of Aedes aegypti (Linnaeus) and Aedes albopictus (Skuse) (Diptera: Culicidae) eggs and adults

Abstract

The control of arboviruses carried by Aedes aegypti (Linnaeus) and Aedes albopictus (Skuse) can be performed with tools that monitor and reduce the circulation of these vectors. Therefore, the efficiency of four types of traps in capturing A. aegypti and A. albopictus eggs and adults, with the biological product Vectobac WG, was evaluated in the field. For this, 20 traps were installed in two locations, which were in the South (Londrina, Paraná) and North (Manaus, Amazonas) Regions of Brazil, from March to April 2017 and January to February 2018, respectively. The UELtrap-E (standard trap) and UELtrap-EA traps captured A. aegypti and A. albopictus eggs: 1703/1866 eggs in Londrina, and 10268/2149 eggs in Manaus, respectively, and presented high ovitraps positivity index (OPI) values (averages: 100%/100% in Londrina, and 100%/96% in Manaus, respectively); and high egg density index (EDI) values (averages: 68/75 in Londrina, and 411/89 in Manaus, respectively), so they had statistically superior efficiency to that of the CRtrap-E and CRtrap-EA traps in both regions, that captured less eggs and adults: 96/69 eggs in Londrina, and 1091/510 eggs in Manaus, respectively. Also presented lower OPI values (averages: 28%/4% in Londrina, and 88%/60% in Manaus, respectively); and lower EDI values (averages: 10.5/9 in Londrina, and 47/30 in Manaus, respectively). The capture ratios of Aedes adults in the UELtrap-EA and CRtrap-EA traps in Londrina and Manaus were 53.3%/29.5% and 0%/9.8%, respectively. UELtrap-EA can be adopted as efficient tool for Aedes monitoring due to their high sensitivity, low cost and ease of use.

Density and diversity of Culicidae (Diptera), with analysis of viral circulation, in urban public establishments in Northern Paraná, Brazil

“…However, the absence of C. quinquefasciatus eggs in the ovitraps is due to this type of breeding, which is not ideal for this species, as it does not always use the same breeding sites as A. aegypti and A. albopictus, in addition to demonstrating the specificity of ovitraps and the attractant used to capture Aedes spp. This result corroborates studies where only A. aegypti and A. albopictus eggs were found in ovitraps installed in urban environments (Silva, 2009;Oliveira and Maleck, 2014;Silva, 2016Silva, , 2019Nascimento, 2017;Rossi da Silva et al, 2021). According to Codeço et al (2015), Silva et al (2018c), Nascimento et al (2020, and Rossi da Silva et al (2021) ovitraps have high specificity and sensitivity for capturing A. aegypti eggs and generating infestation indices, showing better performance compared to larval research.…”

“…This result corroborates studies where only A. aegypti and A. albopictus eggs were found in ovitraps installed in urban environments (Silva, 2009;Oliveira and Maleck, 2014;Silva, 2016Silva, , 2019Nascimento, 2017;Rossi da Silva et al, 2021). According to Codeço et al (2015), Silva et al (2018c), Nascimento et al (2020, and Rossi da Silva et al (2021) ovitraps have high specificity and sensitivity for capturing A. aegypti eggs and generating infestation indices, showing better performance compared to larval research.…”

“…Regarding A. albopictus, the eggs of this species were obtained in ovitraps installed in the external areas of public community facilities, while no adults were found in the interior, suggesting that this species is more frequent in peridomiciliary areas, using bushes as shelter, in parks, woods, or forest fragments in urban areas, or more distant places, such as plantations adjacent to homes and forests close to urban areas, as verified in several studies (Gomes et al, 2005;Lima-Camara et al, 2006;Silva et al, 2006;Martins et al, 2010;Pedrosa, 2013;Medeiros-Sousa et al, 2015;Heinisch et al, 2019;Silva, 2019;Rossi da Silva et al, 2021). Gomes et al (2005) also observed a higher frequency of hematophagy of A. albopictus in peridomicile compared to intradomicile environments.…”

“…However, the capture of A. albopictus eggs in ovitraps shows that populations of this species in Londrina have an urbanized habit and usually use the same artificial breeding sites as A. aegypti (Lima-Camara et al, 2006;Alencar, 2008;Rossi and Silva, 2009;Rodríguez et al, 2013). In several studies, the presence of A. aegypti and A. albopictus eggs in ovitraps was observed (Silva, 2009(Silva, , 2019Pedrosa, 2013;Oliveira and Maleck, 2014;Serpa, 2014;Silva, 2016;Silva et al, 2018c;Custódio et al, 2019;Heinisch et al, 2019;Dixson et al, 2020;Rossi da Silva et al, 2021), while Honório and Lourenço-de-Oliveira (2001), Silva et al (2006), Maciel-de-Freitas et al (2007, Rossi and Silva (2009), Martins et al (2010), andAyllón et al, (2018) observed both species sharing several artificial breeding sites.…”

Identification of Aedes aegypti and Aedes albopictus eggs based on image processing and elliptic fourier analysis

“…An attempt to detect the presence of the dengue virus vector that has been widely used is by using ovitraps. Several studies show ovitraps are able to detect the eggs, larvae, pupae 5 , and adult Aedes aegypti mosquitoes 6 . An ovitrap-based surveillance is usually done by installing a number of ovitraps in a monitoring area.…”