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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 104, No. 1, 2009, pp. 43-47
Bioline Code: oc09007
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 104, No. 1, 2009, pp. 43-47

 en Effect of the chitin synthesis inhibitor triflumuron on the development, viability and reproduction of Aedes aegypti check for this species in other resources
Belinato, Thiago Affonso; Martins, Ademir Jesus; Lima, José Bento Pereira; de Lima-Camara, Tamara Nunes; Peixoto, Alexandre Afrânio & Valle, Denise

Abstract

The control of Aedes aegypti check for this species in other resources is impaired due to the development of resistance to chemical insecticides. Insect Growth Regulators (IGR) exhibit distinct mechanisms of action and are considered potential vector control alternatives. Studies regarding the effects of sublethal IGR doses on the viability of resulting adults will contribute to eval-uating their impact in the field. We analyzed several aspects of Ae. aegypti adults surviving exposure to a partially lethal dose of triflumuron, a chitin synthesis inhibitor. A highly significant difference in the proportion of males and females was noted in the triflumuron-exposed group (65.0% males) compared to the controls (50.2% males). Triflumuron affected adult longevity, particularly for females; after 16 days, only 29.2% of males and 13.8% of females were alive, in contrast with 94% survival of the control mosquitoes. The locomotor activity was reduced and the blood-feeding ability of the treated females was also affected (90.4% and 48.4% of the control and triflumuron-exposed females, respectively, successfully ingested blood). Triflumuron-surviving females ingested roughly 30% less blood and laid 25% fewer eggs than the control females. The treated males and females exhibited a diminished ability to copulate, resulting in less viable eggs.

Keywords
triflumuron - Aedes aegypti - sublethal effects - chitin synthesis inhibitor

 
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