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Mem Inst Oswaldo Cruz

Title:		Laboratory and field evaluation of an oviposition trap for Culex quinquefasciatus (Diptera: Culicidae)
Author(s):		Barbosa RM; Souto A; Eiras AE; Regis L;
Address:		"Departamento de Entomologia, Centro de Pesquisa Aggeu Magalhaes, Fiocruz, Recife, PE, 50670-420, Brasil"
Journal Title:		Mem Inst Oswaldo Cruz
Year:		2007
Volume:		102
Issue:		4
Page Number:		523 - 529
DOI:		10.1590/s0074-02762007005000058
ISSN/ISBN:		0074-0276 (Print) 0074-0276 (Linking)
Abstract:		"An ovitrap (BR-OVT) based on physical and chemical stimuli for attracting gravid Culex quinquefasciatus (Diptera: Culicidae) females was developed and evaluated under laboratory and field conditions. Attractants were assayed using alternative chamber bioassays prior to being used in the BR-OVT oviposition trap. A significant preference of gravid females for sites containing conspecific egg rafts was observed, as a response to the natural oviposition pheromone, as well as for sites treated with the synthetic pheromone erythro-6-acetoxy-5-hexadecanolide. Five- to 20-day old grass infusion was strongly attractive to gravid females for laying eggs. On the other hand, entomopathogenic Bacillus sphaericus (Bs) did not influence the choice of an oviposition site when used in combination with grass infusion and can therefore be used as a larvicide in ovitraps. Results from field trials showed that the BR-OVT with grass infusion and with or without Bs works as a preferred oviposition site for Cx. quinquefasciatus. The BR-OVT was more effective for egg collection when placed indoors and comparison with the number of egg rafts laid in cesspits over 40 days indicates that this very simple ovitrap may be a useful tool for monitoring populations of the most important of the vectors of bancroftian filariasis"
Keywords:		Animals Biological Assay Culex/*anatomy & histology Female Laboratories Mosquito Control/instrumentation/*methods Oviposition/*physiology Pheromones/*pharmacology Time Factors;
Notes:		"MedlineBarbosa, Rosangela M R Souto, Antonio Eiras, Alvaro E Regis, Leda eng Research Support, Non-U.S. Gov't Brazil 2007/07/07 Mem Inst Oswaldo Cruz. 2007 Jun; 102(4):523-9. doi: 10.1590/s0074-02762007005000058"