(Ruy de Souza Lino Junior, 1998-06) Camargo, Marlene de Fátima; Santos, Adelair Helena dos; Oliveira, Antônio Wilson Soares de; Abrão, Newdvar; Alves, Rosa de Belém das Neves; Isac, Eliana
The action of the larvicide Temephos over the Aedes aegypti was
evaluated by means of a test using two concentrations of the product: l ppm
(400 mg/ml) and 2 ppm (800 mg/ml). They were distributed in 6 different
containers: a tire, a clay vase, an aluminum bowl, a glass aquarium, a plastic
bowl and an asbestos tank, ali bearing a volume of 4 liters. Each recipien received 20 larvae of 3rd stage, which were evaluated 24 hours after exposure
to the product and shortly after being removed from the solution. The same
solution was preserved for 14 weeks and the larvae examined every 7 days.
The pesticide's residual action was evaluated by the larvae mortality. Ali the
recipients had a 100% efficacy throughout the testing period, in both
concentrations. At the 400 mg/ml larvicide Temephos concentration in the
"tire" recipient, the mortality rate decreased by 45% after the 5 week.
Similarly, at the 800 mg/ml concentration in the same recipient, the mortality
rate decreased by 40% after the 7lh week and by the end of the trial, no
mortality was noted.