Data/hora: 02/06/2024 06:30:04

Biblioteca(s): 	Embrapa Gado de Leite.	
Data corrente: 	10/11/2022	
Data da última atualização: 	12/12/2022	
Autoria: 	FILGUEIRAS, M. D. G.; MATOS, R. S.; BARRETO, L. P.; MASCARIN, G. M.; RIZZO, P. V.; FREITAS, F. M. C.; PRATA, M. C. de A.; MONTEIRO, C.; FERNANDES, E. K. K.	
Afiliação: 	MARCOS DANIEL GOMES FILGUEIRAS, Universidade Federal de Goiás; RENATA SILVA MATOS; LUCAS PRADO BARRETO, Universidade Federal de Goiás; GABRIEL MOURA MASCARIN, CNPMA; PRICILA VETRANO RIZZO, CNPGL; FERNANDA MARA CUNHA FREITAS, CNPGL; MARCIA CRISTINA DE AZEVEDO PRATA, CNPGL; CAIO MONTEIRO, Universidade Federal de Goiás; ÉVERTON KORT KAMP FERNANDES, Universidade Federal de Goiás.	
Título: 	From the laboratory to the field: efficacy of entomopathogenic nematodes to control the cattle tick.	
Ano de publicação: 	2023	
Fonte/Imprenta: 	Pest Management Science, v. 79, n. 1, p. 216-225, 2023.	
DOI: 	http://doi.org/10.1002/ps.7190	
Idioma: 	Inglês	
Conteúdo: 	BACKGROUND - The control of ticks is challenged by the resistance of tick populations to chemical acaricides. In this study, we evaluated, under laboratory conditions, the efficacy of Heterorhabditis bacteriophora against Rhipicephalus (Boophilus) microplus engorged females with varying body weights (150, 200, 250, 300 or 350 mg per female) or from eight different geographical populations. We also determined the efficacy of H. bacteriophora for tick control under field conditions. RESULTS - R. microplus engorged females with varying body weights exposed to 150 juveniles of H. bacteriophora resulted in a high control efficacy (97.5% to 98.4%). Tests with females from different geographical populations comprised eight tick strains treated with H. bacteriophora and their respective control groups. The biological parameters of females exposed to nematode treatments did not differ significantly and resulted in 89% to 99% of control efficacy. Trials conducted under field conditions were performed in field plots with Megathyrsus maximus grass. Treatment groups received eight cadavers of Tenebrio molitor fully colonized with H. bacteriophora at 1 week prior to the release of female ticks, whereas control groups were untreated. On the first day of the experiment, six engorged females were distributed in each plot. On day 42 and day 63, the apical portion of the grasses with R. microplus larvae were collected and quantified. The population of R. microplus larvae was reduced up to 73.1% in plots treated with H. bacteriophora at day 63 after treatment. CONCLUSION - R. microplus engorged females with varying body weights or from different geographical populations were highly susceptible to H. bacteriophora. The field test demonstrated the efficacy of H. bacteriophora in reducing R. microplus larvae in infested pastures.	
Palavras-Chave: 	Ensaio de campo; Field assays.	
Thesagro: 	Bovino; Carrapato; Controle Biológico; Nematóide.	
Thesaurus Nal: 	Biological control; Heterorhabditis bacteriophora; Rhipicephalus microplus.	
Categoria do assunto: 	L Ciência Animal e Produtos de Origem Animal	
Registro original: 	Embrapa Gado de Leite (CNPGL)	
Exemplares: 	CNPGL - (25795-1) - UPC - AP - DD -  -  -  - DIS