A study of the effects of imidacloprid under laboratory and field conditions on nymphs of Triatoma infestans (Hemiptera: Reduviidae)
Vet. parasitol
; 280: 1-5, 2020. tab, ilus
Article
em En
| LILACS, BVSDIP
| ID: biblio-1562988
Biblioteca responsável:
BR1719.1
Localização: BR1719.1
ABSTRACT
The aim of this study was to determine imidacloprid's lethal activity against fifth-instar nymphs of Triatoma infestans. In the first stage of this work, it was assayed the topical application of this insecticide on non-fed and repletion-fed nymphs. Results showed a DL50 three times greater in non-fed bugs than in those fully engorged. The presence of food determined less time for the insecticide's maximum lethal effect 24â¯h post topical application in fed nymphs and 72â¯h in non-fed nymphs. In the study's second stage, we assayed a xenointoxication assay on dogs. The commercial products, Advantage®, Bayer (imidacloprid 10 % p/v) and Power Ultra®, Brouwer (imidacloprid 5.15 %, permethrin 40 % and piperonyl butoxide [PBO] 3%) were evaluated. Following administration of the insecticide, nymphs were fed on dogs 24, 72, 168, 240 and 336â¯h. Blood intake was similar in nymphs exposed to treated dogs versus controls. Although both commercial products showed low triatomicidal activity, a higher efficacy of the product combining imidacloprid with the synergist piperonyl butoxide and permethrin versus the product with imidacloprid as the only active ingredient was observed, causing in nymphs a mortality rate of 36.3 % and 20.7 %, respectively. Our results suggest that imidacloprid, alone or in combination with permethrin and PBO, is not an alternative for control of T. infestans.
Palavras-chave
Buscar no Google
Coleções:
01-internacional
Base de dados:
BVSDIP
/
LILACS
Assunto principal:
Piretrinas
/
Triatoma
/
Doença de Chagas
/
Reduviidae
/
Cães
/
Xenoenxertos
/
Inseticidas
Limite:
Animals
Idioma:
En
Revista:
Vet. parasitol
Assunto da revista:
MEDICINA VETERINARIA
/
PARASITOLOGIA
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Argentina