Artículos de revistas
Toxicity, repellency and flushing out in Triatoma infestans (Hemiptera: Reduviidae) exposed to the repellents DEET and IR3535
Fecha
2017-05Registro en:
Reynoso, Mercedes María Noel; Seccacini, Emilia Ana; Calcagno, Javier Ángel; Zerba, Eduardo Nicolás; Alzogaray, Raúl Adolfo; Toxicity, repellency and flushing out in Triatoma infestans (Hemiptera: Reduviidae) exposed to the repellents DEET and IR3535; Peer J; Peer J; 2017; 5; 5-2017; 1-14
2167-8359
CONICET Digital
CONICET
Autor
Reynoso, Mercedes María Noel
Seccacini, Emilia Ana
Calcagno, Javier Ángel
Zerba, Eduardo Nicolás
Alzogaray, Raúl Adolfo
Resumen
DEET and IR3535 are insect repellents present worldwide in commercial products; their efficacy has been mainly evaluated in mosquitoes. This study compares the toxicological effects and the behavioral responses induced by both repellents on the blood-sucking bug Triatoma infestans Klug (Hemiptera: Reduviidae), one of the main vectors of Chagas disease. When applied topically, the Median Lethal Dose (72 h) for DEET was 220.8 μg/insect. Using IR3535, topical application of 500 μg/insect killed no nymphs. The minimum concentration that produced repellency was the same for both compounds: 1,15 μg/cm2. The effect of a mixture DEET:IR3535 1:1 was similar to that of their pure components. Flushing out was assessed in a chamber with a shelter containing groups of ten nymphs. The repellents were aerosolized on the shelter and the number of insects leaving it was recorded for 60 min. During that time, 0.006 g/m3 of the positive control tetramethrin flushed out 76.7% of the nymphs, while 1.76 g/m3 of DEET or IR3535 flushed out 30 and 0%, respectively. The concentrations required for both compounds to produce toxicity or flushing out are too high to have any practical applications. However, they showed a promising repellency. Additional research should be done to evaluate their possible use for personal protection against T. infestans bites.