Effectiveness of ectoparasiticides against Aedes aegypti larvae: research note

Abstract

This study evaluated the effectiveness of ectoparasiticides in the control of Aedes aegypti larvae. The following products were used: fluazuron 2,5 g, cypermethrin 150 g, flumethrin 1 g, propoxur 1 g, deltamethrin 25 g, chlorpyrifos 30 g, cypermethrin 15 g, fenthion 15 g, stabilized technical diazinon 40 g, fipronil 2,5%, trichlorfon 97 g, coumaphos 3 g, propoxur 2 g, fenthion 15 g, amitraz 12,5%. They were prepared according to the recommendations of the manufacturer and applied in containers containing A. aegypti larvae in a controlled environment. We inspected the larval viability every 24 hours. These same products were also applied in the collection environments of the larvae, and the breeding of mosquitoes was inspected daily for 30 days. We observed that 100% of the larvae died within 60 minutes on the containers in the laboratory and on the environment. In the sites that were sprayed, the presence of larvae was not verified for a period of up to 30 days. We concluded that these different products, used in animals as ectoparasiticides, were effective against A. aegypti larvae and could also be applied to control this important vector of several viral diseases if this type of use was analyzed and approved by official Brazilian regulations.