Data/hora: 16/06/2024 02:26:44

Biblioteca(s): | Embrapa Gado de Leite.
Data corrente: | 30/12/2019
Data da última atualização: | 06/02/2024
Autoria: | MENDONÇA, A. E. DE; MOREIRA, R. G.; AMARAL, M. DA P. H. DO; MONTEIRO, C. M. DE O.; MELLO, V. DE; VILELA, F. M. P.; HOMEM, F. C. M.; FURLONG, J.; DOLINSKIF, C.; PRATA, M. C. de A.; CHAGAS, E. F. DAS.
Afiliação: | ALESSANDRA ÉSTHER DE MENDONÇA; RAIANA GONÇALVES MOREIRA; MARIA DA PENHA HENRIQUES DO AMARAL; CAIO MÁRCIO DE OLIVEIRA MONTEIRO; VALÉRIA DE MELLO; FERNANDA MARIA PINTO VILELA; FERNANDA CRISTINA MENDONÇA HOMEM; JOHN FURLONG; CLÁUDIA DOLINSKIF; MARCIA CRISTINA DE AZEVEDO PRATA, CNPGL; EVELIZE FOLLY DAS CHAGAS.
Título: | Entomopathogenic nematodes in pharmaceutical formulations for Rhipicephalus microplus (Acari: Ixodidae) control: In vitro evaluation of compatibility, thermotolerance, and efficiency.
Ano de publicação: | 2019
Fonte/Imprenta: | Ticks and Tick-borne Diseases, v. 10, n. 4, p. 781-786, 2019.
DOI: | https://doi.org/10.1016/j.ttbdis.2019.03.012
Idioma: | Inglês
Conteúdo: | This work aimed to investigate candidate biological control agents against the cattle tick Rhipicephalus microplus by studying three entomopathogenic nematodes (EPN) isolates from two species, Heterorhabditis bacteriophora (isolates LPP30 and HP88) and Heterorhabditis baujardi (isolate LPP7). The study comprised the pharmacotechnical development of four test formulations, and their biological evaluation, in three stages: 1) selection of the fittest EPN isolate at 16 ± 1 °C after 120 h of incorporation in the formulations; 2) determination of the effects of temperature and incubation time on the survival of the selected isolate in formulations; 3) evaluation of the in vitro efficacy (infectivity) of the selected EPN formulations and their components against R. microplus females after 72 h exposure. H. baujardi LPP7 presented the highest survival rates in 0.1% carboxymethyl cellulose sodium (CMC) formulations (100% at 25 °C, up to 10 days after incorporation). At the highest tested temperature (34.2 °C), 54% of LPP7 survived for up to 72 h in CMC formulations. The infectivity of LPP7-containing formulation against R. microplus was 99%, reducing oviposition, egg production index and larval hatching. Considering the pressing need for safer acaricide products, incorporation of EPNs in pharmaceutical formulations is presented as a promising approach for the biological control of cattle tick infestations, potentially reducing environmental impact and resistance development associated with chemical acaricides.
Palavras-Chave: | Cattle tick; Heterorhabditis baujardi; Pharmacotechnical development.
Thesaurus Nal: | Biological control.
Categoria do assunto: | O Insetos e Entomologia
Registro original: | Embrapa Gado de Leite (CNPGL)
Exemplares: | CNPGL - (24909-1) - UPC - AP - DD -  -  -  - DIS