Assessment of infection of Stomoxys calcitrans larvae by entomopathogenic nematodes Heterorhabditis amazonensis NEPT11.

Autor:	Monteiro AC; Veterinarian, DSc. Autonomus, Seropédica, RJ, Brazil., de Souza ACF; Veterinarian, MSc. Programa de Pós-Graduação em Ciências Veterinárias (PPGCV), Departamento de Parasitologia Animal (DPA). Instituto de Veterinária (IV), Universidade Federal Rural do Rio de Janeiro (UFRRJ). Seropédica, RJ. Brazil., da Silva DP; Veterinarian, MSc. Programa de Pós-Graduação em Ciências Veterinárias (PPGCV), Departamento de Parasitologia Animal (DPA). Instituto de Veterinária (IV), Universidade Federal Rural do Rio de Janeiro (UFRRJ). Seropédica, RJ. Brazil., de Almeida GPS; Veterinarian, MSc. Programa de Pós-Graduação em Ciências Veterinárias (PPGCV), Departamento de Parasitologia Animal (DPA). Instituto de Veterinária (IV), Universidade Federal Rural do Rio de Janeiro (UFRRJ). Seropédica, RJ. Brazil., de Souza VT; Undergraduate Student in Veterinary Medicine, IV, UFRRJ. Seropédica, RJ, Brazil., Monteiro JLL; Agronomist, DSc. Programa de Pós-Graduação em Agronomia (POSAGRO), Departamento de Engenharia Agrícola (DEA). Centro de Ciências Agrárias, Universidade Federal de Roraíma, Cauamé, RR. Brazil., Chambarelli MCMDC; Veterinarian, DSc. DPA, IV, UFRRJ. Seropédica, RJ. Brazil., Bittencourt AJ; Veterinarian, DSc. Departamento de Medicina e Cirurgia Veterinária (DMCV), IV, UFRRJ. Seropédica, RJ, Brazil.
Jazyk:	angličtina
Zdroj:	Brazilian journal of veterinary medicine [Braz J Vet Med] 2024 Apr 05; Vol. 46, pp. e000424. Date of Electronic Publication: 2024 Apr 05 (Print Publication: 2024).
DOI:	10.29374/2527-2179.bjvm000424
Abstrakt:	This study aimed to evaluate the virulence of Heterorhabditis amazonenses NEPT11 against larvae of Stomoxys calcitrans . Groups of 10 third-instar fly larvae were deposited in Petri dishes, to which were added 50, 100 and 200 EPNs/larva in 4ml of distilled water. The volume of the control group was the same as the treated group, but without EPNs. Larval mortality was observed daily, until larvae died or adults emerged. The Petri dishes were kept on laboratory shelves at 27 ± 1 °C and 70 ± 10% RH. The experiment was replicated six times. A regression analysis revealed quadratic behavior with increasing concentrations, indicating that the concentration of 200 EPNs/larva (48%) was the most efficient among the tested concentrations, while concentrations of 50 and 100 EPNs/larva killed 26.6 and 40% of larvae, respectively. In general, none of the treatments resulted in a mortality rate of more than 50%, but all the treated groups exhibited a higher mortality than that of the control group. It is concluded that the EPN H. amazonensis NEPT11 shows a promising potential to control third-instar larvae of S. calcitrans . However, further studies are needed in different situations to better understand the activity of this organism against the immature stages of the stable fly. Competing Interests: Conflict of interests: ACMS, ACFS, DPS, GPSA, VTS, JLLMN, MCMCC and AJB – No conflict of interest.
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu