Anais do X Simpósio Internacional em Ciências Veterinárias (X SINCVET)

CORN OIL-BASED FORMULATIONS IMPROVE THE EFFICACY OF CORDYCEPS JAVANICA AGAINST RHIPICEPHALUS MICROPLUS LARVAE

Publicado em 22/05/2026 - ISBN: 978-65-272-2456-3

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Trabalho
Título do Trabalho
CORN OIL-BASED FORMULATIONS IMPROVE THE EFFICACY OF CORDYCEPS JAVANICA AGAINST RHIPICEPHALUS MICROPLUS LARVAE
Autores
  • Joana da Rocha Matos
  • Adriani da Silva Carneiro Lopes
  • Thaís Almeida Corrêa
  • Emily Mesquita da Silva
  • Laura Nobrega Meirelles
  • VIT?RIA BORIO
  • Américo de Castro Monteiro Sobrinho
  • Isabele da Costa Angelo
  • Patricia Golo
  • Vânia Rita Elias Pinheiro Bittencourt
Modalidade
Resumo Simples
Área temática
Ectoparasitos: sistemática, epidemiologia e controle
Data de Publicação
22/05/2026
País da Publicação
Brasil
Idioma da Publicação
pt-BR
Página do Trabalho
https://www.even3.com.br/anais/x-simposio-internacional-ciencias-veterinarias/1430061-corn-oil-based-formulations-improve-the-efficacy-of-cordyceps-javanica-against-rhipicephalus-microplus-larvae
ISBN
978-65-272-2456-3
Palavras-Chave
biological control, entomopathogenic fungi, Rhipicephalus microplus, vegetable oil, formulation
Resumo
Rhipicephalus microplus remains one of the most damaging ectoparasites affecting cattle production worldwide, and the growing resistance to multiple classes of acaricides highlights the need for sustainable alternatives. Entomopathogenic fungi have emerged as promising biological control agents, particularly when formulated with oils that enhance their performance. This study evaluated the compatibility and efficacy of corn oil–based formulations of Cordyceps javanica against R. microplus larvae under controlled laboratory conditions. Thirteen treatments were assessed: two controls (1% Tween 80; 0.01% silicone oil + 1% Tween 80), three corn oil emulsions (1%, 3%, and 5%), two unformulated fungal suspensions (10⁷ and 10⁸ conidia/mL in 1% Tween 80), and six fungus–oil combinations consisting of each fungal concentration formulated with 1%, 3%, or 5% corn oil. Approximately 1000 larvae per replicate were immersed in 1 mL of each treatment for 3 minutes and incubated at 25 ± 1 °C and ≥80% RH. Mortality was recorded 5, 10, and 15 days after the treatment. All treatments were performed in triplicate, and the entire experiment was repeated three times. Control groups showed minimal mortality (<1.2%) throughout the evaluation period. Corn oil alone caused limited mortality (≤20.1%), increasing proportionally with concentration. Unformulated C. javanica suspensions also resulted in low tick mortality, ranging from 6.2% to 18.8% depending on the conidial concentration and evaluation day. In contrast, the fungus formulated with corn oil exhibited markedly enhanced virulence. Mortality in the fungus–oil treatments ranged from 64.1% on day 5 to 100% on day 15, with all formulated treatments significantly outperforming both oil-only groups and unformulated fungal suspensions. A clear synergistic interaction between the corn oil carrier and fungal conidia was detected across all combinations. These results demonstrate the potential of vegetable oil carriers to improve fungal performance while offering an environmentally compatible alternative for the biological control of cattle ticks.
Título do Evento
X Simpósio Internacional em Ciências Veterinárias | X International Symposium in Veterinary Sciences
Cidade do Evento
Seropédica
Título dos Anais do Evento
Anais do X Simpósio Internacional em Ciências Veterinárias (X SINCVET)
Nome da Editora
Even3
Meio de Divulgação
Meio Digital

Como citar

MATOS, Joana da Rocha et al.. CORN OIL-BASED FORMULATIONS IMPROVE THE EFFICACY OF CORDYCEPS JAVANICA AGAINST RHIPICEPHALUS MICROPLUS LARVAE.. In: Anais do X Simpósio Internacional em Ciências Veterinárias (X SINCVET). Anais...Seropédica(RJ) UFRRJ, 2025. Disponível em: https//www.even3.com.br/anais/x-simposio-internacional-ciencias-veterinarias/1430061-CORN-OIL-BASED-FORMULATIONS-IMPROVE-THE-EFFICACY-OF-CORDYCEPS-JAVANICA-AGAINST-RHIPICEPHALUS-MICROPLUS-LARVAE. Acesso em: 06/11/2026

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