Susceptibility of Aedes aegypti (L) to the insect growth regulators diflubenzuron and methoprene in Uberlândia, State of Minas Gerais.

Abstract

Aedes aegypti (L) (Diptera: Culicidae) was reared in several concentrations of diflubenzuron and methoprene under laboratory conditions in Uberlândia, State of Minas Gerais, southeastern Brazil. Characteristics such as LC50 and LC95, the susceptibility of immature stages of different ages to these insect growth regulators and their residual effects were studied. The LC50 and LC95 of diflubenzuron and methoprene were 5.19 and 12.24 ppb; 19.95 and 72.08 ppb, respectively. While diflubenzuron caused great mortality in all larval instars, methoprene was more effective when the mosquito was exposed from the start of the fourth larval instar onwards. Commercial concentrations of these two insect growth regulators close to LC95 presented greater residual activity than did their respective technical formulations. The parameters were compared with those obtained elsewhere. The characteristics investigated here indicate that these insect growth regulators are effective alternatives for controlling the dengue vector in the Uberlândia region.

• Authors: Juliana Junqueira de Silva, Júlio Mendes
• Journal: Revista da Sociedade Brasileira de Medicina Tropical (Rev Soc Bras Med Trop) 2007 Nov-Dec Vol. 40 Issue 6 Pg. 612-6 ISSN: 0037-8682 [Print] Brazil
• PMID: 18200410 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Juvenile Hormones
• Methoprene
• Diflubenzuron

Topics

• Aedes (drug effects, growth & development)
• Animals
• Brazil
• Diflubenzuron (pharmacology)
• Dose-Response Relationship, Drug
• Juvenile Hormones (pharmacology)
• Methoprene (pharmacology)