Impact of water renewal on the residual effect of larvicides in the control of Aedes aegypti.
This study was carried out to evaluate the residual effect of three larvicides under laboratory conditions for 100 days in Aedes aegypti. 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 (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.
Pontes
Ricardo José Soares
RJ
Departamento de Saúde Comunitária, Faculdade de Medicina, Universidade Federal do Ceará, Fortaleza, CE, Brasil. rjpontes@fortalnet.com.br
Dantas Filho
Fábio Fernandes
FF
Alencar
Carlos Henrique Morais de
CH
Regazzi
Ana Cláudia Ferreira
AC
Cavalcanti
Luciano Pamplona de Góes
LP
Ramos
Alberto Novaes
AN
Lima
José Wellington de Oliveira
JW
D000330:Aedes; D000818:Animals; D007303:Insect Vectors; D007306:Insecticides; D007814:Larva; D009032:Mosquito Control; D010573:Pesticide Residues / Q000494:pharmacology*; D000002:Temefos; D013997:Time Factors; D014867:Water
D007306:Insecticides; D010573:Pesticide Residues; D014867:Water; D000002:Temefos