Suscetibilidade de Larvas de Simulídeos ao Larvicida Temephos em Caarapó, MS

Tatiane Zaratini Teixeira; Eduardo José Arruda; Magda Freitas Fernandes; Carlos Fernando Salgueirosa Andrade; Bruno do Amaral Crispim; André Kioshi da Silva Nakamura; Emerson Pereira da Silva

doi:10.14295/BA.v9.123

Authors

Tatiane Zaratini Teixeira Universidade Federal da Grande Dourados
Eduardo José Arruda Universidade Federal da Grande Dourados
Magda Freitas Fernandes Universidade Federal da grande rede Dourados
Carlos Fernando Salgueirosa Andrade Universidade Federal da Grande Dourados
Bruno do Amaral Crispim Universidade Federal da Grande Dourados
André Kioshi da Silva Nakamura Universidade Federal da Grande Dourados
Emerson Pereira da Silva Universidade Federal da Grande Dourados

DOI:

https://doi.org/10.14295/BA.v9.123

Abstract

Blackfly control in Brazil is necessary to avoid nuisance to rural or urban communities and economic losses in agricultural or tourist activity areas. The susceptibility of Simulium spp. larvae was performed to the organophosphate temephos (Abate 500 CE) at the Caarapó stream, in the city of Caarapó in the state of Mato Grosso do Sul. The resistance to the larvicide was indicated by the rapid biochemical test of esterase activity carried out with extracts of larvae, and confirmed by the results of the field bioassay with larvae in troughs in the stream bed. For the field bioassay final stage larvae were exposed to a Temephos Operational Concentration of 0.5 ppm ai/10 minutes and a Diagnostic Concentration of 2.5 ppm ai/10 minutes and low mean mortality was obtained (5.7% and 44.6 % respectively), confirming the resistance and indicating the need for using other products for blackfly control in this area.