Potential synergistic effect of Melia azedarach fruit extract and Beauveria bassiana in the control of Rhipicephalus (Boophilus) microplus (Acari: Ixodidae) in cattle infestations |
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| Authors: | Sousa Lorena Alessandra Dias Pires Hélio Bernardes Soares Sara Fernandes Ferri Pedro Henrique Ribas Patricia Lima Eliane Martins Furlong John Bittencourt Vânia Rita Elias Pinheiro Perinotto Wendell Marcelo de Souza Borges Lígia Miranda Ferreira |
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| Institution: | Laboratório de Parasitologia Veterinária, Universidade Federal de Goiás, Campus Samambaia (Campus II), CP 131 ZIP 74001-970, Goiania, GO, Brazil. lorenavet2@yahoo.com.br |
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| Abstract: | The use of a concentrate emulsion of Melia azedarach green fruits and a suspension of the fungus Beauveria bassiana was evaluated in the control of Rhipicephalus microplus on artificially infested cattle. The evaluation was conducted following the protocol established by the Brazilian Agriculture Ministry. Five groups of 4 or 5 animals were allocated to one of the following treatments: emulsion concentrate of M. azedarach at 0.25% (T AZED 0.25%), emulsion concentrate of M. azedarach at 0.5% (T AZED 0.5%), B. bassiana at 2.4 × 10(8) conidia (T BASS), association of the concentrate of M. azedarach at 0.25% with B. bassiana at 2.4 × 10(8) conidia (T AZED 0.25%+BASS), and control (untreated). The association of the two compounds provided better results than any one isolated treatment, indicating compatibility or perhaps a synergy between M. azedarach and B. bassiana. This treatment resulted in fewer engorged females (129 ± 70) than in the control group (233 ± 82), showing high performance against all developmental stages of the tick. Results revealed an apparent synergistic effect of M. azedarach and B. bassiana in the control of R. microplus that should be further investigated. |
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