Excito-repellency effect of deltamethrin on triatomines under laboratory conditions

Revista da Sociedade Brasileira de Medicina Tropical

Liléia Diotaiuti²  Claysson Marques Penido²  Holbiano Saraiva De Araújo²  Christopher John Schofield¹  Cláudio Teixeira Pinto¹ 

[1] ,Fundação Oswaldo Cruz Centro de Pesquisas René Rachou Laboratório de Triatomíneos e Epidemiologia da Doença de ChagasBelo Horizonte MG ,Brasil

关键词: Excito-repellency;    Triatominae;    Deltamethrine;    Pyrethroid;    Chagas' disease;    Control;    Excito-repelência;    Triatominae;    Deltametrina;    Piretróide;    Doença de Chagas;    Controle;   

DOI  :  10.1590/S0037-86822000000300002

来源: SciELO

【 摘 要 】

This work demonstrates that deltamethrin in low doses produces an excito-repellency effect on triatomines, as already observed for mosquitoes. A wooden box covered with a cloth impregnated with deltamethrin at doses of 2.5 and 5mg ai/m² was utilized for the experiment. The triatomine species studied were Triatoma infestans, Panstrongylus megistus, Rhodnius neglectus and Triatoma sordida. Adults were released in one of the sides of the box and their position was noted in subsequent periods. The observations were realized on the day the cloth was impregnated and subsequently repeated at 30 and 60 days for T. sordida; on day 120, the remaining species were included. Insect mortality and attempts at flight from the box were also observed. Excito-repellency was evident for all species and doses up to day 120. The only species that attempted to fly was P. megistus. The excito-repellency effect may be considered as an additional advantage to the insecticide power, as it should be able to prevent the installation of new colonies by females that fly into the homes, and at the moment of the spraying, it should promote the flushing out of triatomines from the wall crevices and from other shelters.

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