Evaluation of Different Larvicides for the Control of Aedes aegypti
(Linnaeus) (Diptera: Culicidae) under Simulated Field Conditions
Rose Monnerat; Vinicius Dumas; Felipe Ramos; Luciano Pimentel;
Ana Nunes; Edison Sujii; Lílian Praça; Paulo
Vilarinhos
Abstract
Dengue is an arbovirosis, transmitted by Aedes aegypti (Linnaeus)
(Diptera: Culicidae). In Brazil the larval control of this mosquito has
utilized the organophosphate temephos, which has selected resistant
mosquito populations. Faced with this problem, the Ministry of Health
is searching for new products including those based on Bacillus thuringiensis
israelensis (Bti). The aim of this work was to compare the
efficacy and persistence of two bioinsecticides based on Bti (VectoBac
WDG and VectoBac DT), one growth regulator – pyriproxyfen
(Sumilarv 0.5 G), and a chemical product – temephos (Fersol
1G) in susceptible and temephos resistant populations of A. aegypti.
The results showed that the Bti products gave 100% population control
for 20 days and there was no difference in susceptibility among the two
mosquito populations. The products based on temephos and pyriproxyfen
caused 100% larval mortality in both populations for 60 days after
treatment.
Key
words
- bioinsecticides, mosquito, chemical insecticides.
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