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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Evaluation of Tagetes patula (Asteraceae) as an ecological alternative in the search for natural control of the cattle tick Rhipicephalus (Boophilus) microplus (Acari: Ixodidae)

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Autor(es):
Sanches Politi, Flavio Augusto [1] ; Fantatto, Rafaela Regina [2] ; da Silva, Alexander Alves [1] ; Moro, Isabela Jacob [2] ; Sampieri, Bruno Rodrigues [3] ; Camargo-Mathias, Maria Izabel [4] ; Figueiredo, Amanda [5] ; de Souza Chagas, Ana Carolina [5] ; Furlan, Maysa [1]
Número total de Autores: 9
Afiliação do(s) autor(es):
[1] Univ Estadual Paulista Julio de Mesquita Filho UN, Inst Quim Araraquara, Araraquara, SP - Brazil
[2] Univ Estadual Paulista Julio de Mesquita Filho UN, Fac Ciencias Farmaceut Araraquara, Araraquara, SP - Brazil
[3] Univ Estadual Campinas, UNICAMP, Museu Zool, Campinas, SP - Brazil
[4] Univ Estadual Paulista Julio de Mesquita Filho UN, Inst Biociencias Rio Claro, Rio Claro, SP - Brazil
[5] Embrapa Pecuaria Sudeste, Empresa Brasileira Pesquisa Agr, Sao Carlos, SP - Brazil
Número total de Afiliações: 5
Tipo de documento: Artigo Científico
Fonte: Experimental and Applied Acarology; v. 77, n. 4, p. 601-618, APR 2019.
Citações Web of Science: 0
Resumo

The cattle tick Rhipicephalus microplus is a great sanitary problem and causes huge losses to livestock, being a vector of important diseases. The aim of this work was to verify the action of plant-derived material obtained from Tagetes patula on the life cycle of R. microplus, as well as to analyze the action of these extracts on ovary cells of engorged females. In the Adult Immersion Test, the crude ethanolic extract (Tp(EtOH)) showed an efficacy of 99.2% (LC50=18.60mgmL(-1)). From the repellency test, it was found that both the Tp(EtOH) and essential oil were 100% efficient on the larval stage. In addition, in the Larval Package Test, a mortality of 98.37% was obtained with Tp(EtOH) (LC50=3.798mgmL(-1)). From the microscopic analysis of ovary cells, morphological changes in the chorion and cytoplasm of oocytes were observed, with vacuolization around the germinal vesicle and disorganization of the pedicular cells, suggesting an interference in the normal embryogenic formation of the larvae. These results demonstrate that T. patula extracts interfere at all stages of development of the ixodid, from eggs to adults forms, and have a pronounced repellent effect. In addition, the results of the cytotoxicity assays performed on keratinocytes, as well as previous information on oral and dermal acute toxicity (LD50>4000mgkg(-1)), attest that T. patula can be a safe alternative for ectoparasitic control, representing an alternative for development of a formulation used to help control populations of ticks in the field. (AU)

Processo FAPESP: 13/07600-3 - CIBFar - Centro de Inovação em Biodiversidade e Fármacos
Beneficiário:Glaucius Oliva
Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
Processo FAPESP: 13/03493-8 - Potencial de extratos brutos, óleo essencial e compostos isolados obtidos de Tagetes patula l. (Asteraceae) como antiparasitário botânico contra Rhipicephalus (Boophilus) microplus, Haemonchus contortus e Cimex lectularis
Beneficiário:Flávio Augusto Sanches Politi
Linha de fomento: Bolsas no Brasil - Pós-Doutorado