Banca de QUALIFICAÇÃO: ALEJANDRO SANDRIA DÍAZ

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE: ALEJANDRO SANDRIA DÍAZ
DATA: 12/12/2025
HORA: 09:00
LOCAL: Anfiteatro de Entomologia
TÍTULO:

Ocimum basilicum L. (Lamiaceae) essential oil: Toxicity against Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae) and selectivity for Telenomus remus Nixon, 1937 (Hymenoptera: Scelionidae)

PALAVRAS-CHAVES:

basil, armyworm, egg parasitoid, biological control, IPM.

PÁGINAS: 34
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
SUBÁREA: Fitossanidade
ESPECIALIDADE: Entomologia Agrícola
RESUMO:

Spodoptera frugiperda is an agricultural pest that has spread to several regions, with frequent reports of populations resistant to synthetic insecticides. Consequently, there is an increasing number of studies seeking novel control strategies compatible with beneficial organisms. This study aimed to: (i) evaluate the toxicity of Ocimum basilicum essential oil (EO) to S. frugiperda; (ii) chemically characterize O. basilicum EO; (iii) determine the toxicity of the EO’s major compound to S. frugiperda; and (iv) assess its selectivity toward T. remus. The EO was toxic to caterpillars (LD₅₀ = 13.36 μg/μL). Methyl chavicol was identified as the major compound (86.14%) in O. basilicum EO. Both the EO and methyl chavicol exhibited toxicity to S. frugiperda. The EO reduced the emergence of T. remus in the F₂ and F₃ generations when eggs and pupae were treated within the natural host and was classified as slightly toxic. However, it did not affect the parasitism rate and was considered harmless according to the IOBC toxicity scale. The sex ratio shifted toward a higher proportion of males. The EO caused 100% mortality in adult T. remus. In conclusion, O. basilicum EO is toxic to S. frugiperda and poses low risk to the parasitoid T. remus, affecting only its immature stages. These results demonstrate the potential of this EO for use in integrated pest management programs targeting this noctuid.

MEMBROS DA BANCA:
Externo à Instituição - LIVIA APARECIDA DE SOUZA - UFLA (Membro)
Externo à Instituição - KAROLINA GOMES DE FIGUEIREDO (Suplente)
Externo à Instituição - JÚLIA ASSUNÇÃO DE CASTRO OLIVEIRA - UFLA (Membro)
Presidente - GERALDO ANDRADE DE CARVALHO (Membro)
Externo à Instituição - DEJANE SANTOS ALVES - UTFPR (Membro)