Residual effect of lambdacyhalothrin on Triatoma infestans
Mem. Inst. Oswaldo Cruz
; 90(3): 415-419, May-Jun. 1995.
Article
em En
| LILACS
| ID: lil-319882
Biblioteca responsável:
BR1.1
RESUMO
Insecticidal residual effect and triatomine infestation rates in houses of a community fumigated with lambdcyhalothrin (Icon) are reported. No mortality was observed in 5th-instar Triatoma infestans nymphs in 72-hr exposure test on three different surfaces, one month after fumigation for a dose of 31.5 mg am/m2. However, during post-exposure observation a mortality of 60 was recorded for those insect exposed on sprayed woodboard. The results observed with mud-containing treated walls, were markedly poorer (0 of mortality). Twelve month after spraying 40 of mortality was observed on first-instar T. infestans nymphs in 72-hr exposure test on woodboard, but lower mortality rates were observed in mud-containing materials. When the effect of deltamethrin (109 mg ai/m2) and lambdcyhalothrin (94 mg ai/m2) was compared, the former did not appear to be superior at similar loads. Both have showed a mortality rate of 30 on 5th-instar T. infestans nymphs three months post-fumigation. The dose utilized in the field fumigation was enough to get a significant (p < 0.0001) control of triatomine domestic infestation, since it was sufficient to keep 95 of the houses uninfested throughout 21 months following treatment, when compared with baseline situation. A remarkable knock-down effect on adult and nymphs forms of the insect and a high in situ mortality were observed as a result of its application, even at very low doses.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
LILACS
Assunto principal:
Piretrinas
/
Triatoma
/
Inseticidas
Limite:
Animals
País/Região como assunto:
America do sul
/
Paraguay
Idioma:
En
Revista:
Mem. Inst. Oswaldo Cruz
Assunto da revista:
MEDICINA TROPICAL
/
PARASITOLOGIA
Ano de publicação:
1995
Tipo de documento:
Article
País de afiliação:
Paraguai
País de publicação:
Brasil