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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 105, No. 2, 2010, pp. 220-224
Bioline Code: oc10038
Full paper language: English
Document type: Short Communication
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 105, No. 2, 2010, pp. 220-224

 en Impact of water renewal on the residual effect of larvicides in the control of Aedes aegypti check for this species in other resources
Pontes, Ricardo José Soares; Filho, Fábio Fernandes Dantas; de Alencar, Carlos Henrique Morais; Regazzi, Ana Cláudia Ferreira; Cavalcanti, Luciano Pamplona de Góes; Ramos, Alberto Novaes Jr. & Lima, José Wellington de Oliveira

Abstract

This study was carried out to evaluate the residual effect of three larvicides under laboratory conditions for 100 days in Aedes aegypti check for this species in other resources . The larval mortality rate was measured without water renewal or with daily water renewal (80%). With temephos, there was 100% mortality in both groups until the 70th day. In the Bacillus thuringiensis israelensis check for this species in other resources (Bti)-WDG test, there was no difference during the first 20 days. With Bti-G, without water renewal, mortality was sustained above 90% for up to 35 days. The second experiment (with water renewal) reduced the mortality to below 90% after the first 20 days. When renewed water was provided, the residual effect was significantly lower for all larvicides.

Keywords
Aedes, dengue, insect control, insecticides, organophosphate, Bacillus thuringiensis

 
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