Memórias do Instituto Oswaldo Cruz | |
Residual effect of lambdacyhalothrin on Triatoma infestans | |
Esteban A. Ferro2  Antonieta Rojas De Arias2  M. Elena Ferreira2  Luis C. Simancas2  Luis S. Rios1  Jorge M. Rosner1  | |
[1] ,Universidad Nacional de Asunción Instituto de Investigaciones en Ciencias de la Salud Asunción,Paraguay | |
关键词: Triatoma infestans; lambdacyhalothrin; pyrethroids; insect control; | |
DOI : 10.1590/S0074-02761995000300019 | |
来源: SciELO | |
【 摘 要 】
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.
【 授权许可】
CC BY
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
【 预 览 】
Files | Size | Format | View |
---|---|---|---|
RO202005130044849ZK.pdf | 292KB | download |