Related Experiment Videos
[Insecticide resistance in Simulium populations (Diptera, Simuliidae)]
Jairo Campos1, Carlos Fernando S Andrade
1Universidade Estadual de Campinas, Campinas, SP, 13084-971, Brasil. jairocag@unicamp.br
Cadernos De Saude Publica
|June 6, 2002
Summary
Simulium (Chirostilbia) pertinax populations in Brazil show resistance to temephos, an important larvicide. This study assessed susceptibility in multiple Brazilian states, revealing resistance and discussing potential mechanisms.
Area of Science:
- Entomology
- Toxicology
- Vector Control
Context:
- Simulium (Chirostilbia) pertinax is a significant pest in Brazil.
- Temephos is a widely used organophosphate insecticide for controlling black flies.
- Historical use of temephos has raised concerns about insecticide resistance.
Purpose:
- To evaluate the susceptibility of Simulium (Chirostilbia) pertinax larvae to temephos across different Brazilian states.
- To identify populations exhibiting resistance to the operational concentration of temephos.
- To discuss potential mechanisms of organophosphate resistance in this species.
Summary:
- Larvae of Simulium (Chirostilbia) pertinax from Southern and Southeastern Brazil were subjected to in situ bioassays using a diagnostic concentration of temephos (0.1ppm a.i./10min).
- Populations from Paraná, Rio de Janeiro, and São Paulo were characterized as susceptible (S) or resistant (R).
- The findings indicate varying levels of temephos susceptibility, with evidence of resistance in some populations, necessitating a review of control strategies.
Impact:
- The study provides crucial data on the current status of temephos resistance in Simulium (Chirostilbia) pertinax populations.
- Results can inform public health strategies for effective black fly control and disease vector management.
- Understanding resistance mechanisms is vital for developing sustainable pest management programs and preserving insecticide efficacy.