Testing fungus impregnated cloths for the control of adult Aedes aegypti under natural conditions

Particle and Fibre Toxicology

Richard I Samuels²  César R Pereira²  Carlos P Silva¹  Aline T Carolino²  Adriano R Paula² 

[1] Departamento de Bioquímica, Universidade Federal de Santa Catarina, 88040–900, Florianópolis, Brazil;Department of Entomology and Plant Pathology, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes RJ CEP 28013-602, Brazil

关键词: Behaviour;    Blood feeding;    Dengue;    Vector;    Insecticide;    Fungus;    Field testing;    Virulence;   

Others  :  824694
DOI  :  10.1186/1756-3305-6-256

 received in 2013-07-03, accepted in 2013-09-01,  发布年份 2013

【 摘 要 】

Background

Entomopathogenic fungi could be useful tools for reducing populations of the dengue mosquito Aedes aegypti. Here the efficiency of fungus (Metarhizium anisopliae) impregnated cloths (with and without imidacloprid [IMI]) was evaluated against adult A. aegypti in simulated human dwellings. Behaviour of mosquitoes in the presence of black cloths was also investigated.

Findings

When mosquitoes were released into the test rooms, the lowest survival rates (38%) were seen when five black cloths impregnated with conidia of ESALQ 818 + 10 ppm IMI were fixed under tables and chairs. This result was significantly lower than the survival rate recorded when cloths were impregnated with ESALQ 818 alone (44%) or ESALQ 818 + 0.1 ppm IMI (43%). Blood fed A. aegypti had lower landing frequencies on black cloths than sucrose fed insects during the first 24 h following feeding, which may have been due to reduced flight activity. Few mosquitoes (4-5%) were observed to land on the cloths during the hours of darkness. The landing pattern of sucrose-fed mosquitoes on non-treated and fungus-treated cloths was similar.

Conclusion

The synergism between M. anisopliae and IMI significantly reduced Aedes survival in simulated field conditions. The use of fungus impregnated cloths is a promising point source application method for the control of adult A. aegypti.

【 授权许可】

   
2013 Paula et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

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