Mestrado em Agronomia

URI Permanente para esta coleção

http://repositorio.ufes.br/handle/10/17350

Nível: Mestrado Acadêmico
Ano de início: 2004
Conceito atual na CAPES: 4
Ato normativo: Mestrado - Reconhecido Port. MEC 609, de 14/03/2019, DOU 18/03/2019, parecer 487/2018).
Periodicidade de seleção: Semestral
Área(s) de concentração: Produção Vegetal
Url do curso: https://producaovegetal.ufes.br/pt-br/pos-graduacao/PPGA/detalhes-do-curso?id=1427

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    Efeito de fitoquímicos sobre Tetranychus urticae Koch, 1836 (Acari: Tetranychidae)
    (Universidade Federal do Espírito Santo, 2023-11-17) Oliveira, Diná Vimercati; Co-orientador1; https://orcid.org/; http://lattes.cnpq.br/; Co-orientador2; https://orcid.org/; http://lattes.cnpq.br/; Co-orientador3; https://orcid.org/; http://lattes.cnpq.br/; Co-orientador4; ID do co-orientador4; Lattes do co-orientador4; Orientador1; https://orcid.org/; http://lattes.cnpq.br/; Orientador2; https://orcid.org/; http://lattes.cnpq.br/; https://orcid.org/; http://lattes.cnpq.br/; 1º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 2º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 3º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 4º membro da banca; http://lattes.cnpq.br/; 5º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 6º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 7º membro da banca; https://orcid.org/; http://lattes.cnpq.br/
    In this work, the lethal and ovicidal effect of garlic and soursop vegetable oils and the isolated compound d-limonene and formulations based on these oils on adults of Tetranychus urticae and their eggs were evaluated. For the preparation of the formulations using the aforementioned oils as the active ingredient, the addition of adjuvant agents with encapsulating and emulsifying properties was carried out, in order to enhance the effects of these oils on adults and eggs. The oils and formulations tested to evaluate lethal activity were diluted in concentrations at 0.1%, 0.2%, 0.4%, 0.6%, 0.8% and 1.0% (v/v) and sprayed directly on the adult mites. Dilutions of 0.1%, 0.2%, 0.4% and 0.6% (v/v) of the oils and their respective formulations were prepared to attest to the ovicidal effect and applied to T. urticae eggs. For the only diluted oils, a high acaricidal potential of garlic oil was observed, which in lower concentrations was considerably effective. The formulations showed promise in the face of increased mite mortality for all phytochemicals used and at all concentrations. Regarding the ovicidal effect, garlic and soursop oil at concentrations of 0.4% and 0.6% (v/v) showed significant potential, making the treated eggs unviable, reaching hatching rates below 20%. As for the formulations, they proved to be more effective in this bioassay, when compared to the pure bioactives, making it impossible to develop and hatch eggs in lower concentrations and for the three treatments
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    Toxicidade e deterrência de extratos pirolenhosos e óleos vegetais sobre Liriomyza sativae (Diptera: Agromyzidae)
    (Universidade Federal do Espírito Santo, 2023-11-20) Pereira, Jéssica Barboza; Co-orientador1; https://orcid.org/; http://lattes.cnpq.br/; Co-orientador2; https://orcid.org/; http://lattes.cnpq.br/; Co-orientador3; https://orcid.org/; http://lattes.cnpq.br/; Co-orientador4; ID do co-orientador4; Lattes do co-orientador4; Orientador1; https://orcid.org/; http://lattes.cnpq.br/; Orientador2; https://orcid.org/; http://lattes.cnpq.br/; https://orcid.org/; http://lattes.cnpq.br/; 1º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 2º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 3º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 4º membro da banca; http://lattes.cnpq.br/; 5º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 6º membro da banca; https://orcid.org/; http://lattes.cnpq.br/; 7º membro da banca; https://orcid.org/; http://lattes.cnpq.br/
    Mining flies belong to the genus Liriomyza, and they exhibit extensive polyphagy, which causes irreparable losses in plant species. The most severe impacts caused by the pest are associated with its larval stage. The increase in the number of insecticide applications as well as doses above the recommendation aimed at efficiency in con trolling the pest can lead to the emergence of populations with resistance. The objec tive of this work was to develop methods aimed at sustainable management for L. sativae using (1) pyroligneous extracts (2) Vegetable oils and respective emulsions. For the toxicity test, solutions were prepared at different concentrations by diluting them in distilled water, leaf discs containing L. sativae larvae were immersed in the solution. For insect activity and deterrence tests, jack bean plants were subjected to airbrush treatments, sprayed with 6 mL of the solutions on each plant. It was verified through the results that (1) the pyroligneous extracts caused mortality in three-day-old leafminer larvae, with emphasis on the coffee straw extract at 350ºC. (2) Fixed neem oil and its association with citronella were efficient during the developmental stages of the leafminer fly. The emulsion enhanced the effectiveness of the oils. It is concluded that pyroligneous extracts and vegetable oils are effective against the leafminer fly. The use of emulsions has been shown to be capable of enhancing the effect of oils, representing a promising strategy for the management of L. sativae