Banca de DEFESA: FRANCISCO ANTONIO MABSON HENRIQUE LOPES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : FRANCISCO ANTONIO MABSON HENRIQUE LOPES
DATE: 28/02/2023
TIME: 19:00
LOCAL: Video Conferência
TITLE:

INSECTICIDAL ACTIVITY OF FORMULATIONS BASED ON BINARY MIXTURES OF ESSENTIAL OIL OF Lippia gracilis AND Melaleuca leucadendra WITH FIXED OIL OF Spondias mombin

KEY WORDS:

botanical insecticide, diamondback moth, potentiality, volatilization, formulations.

PAGES: 81
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Química Orgânica
SPECIALTY: Química dos Produtos Naturais
SUMMARY:

The volatility of essential oils can be an obstacle when used to control agricultural pests due to their short time of action in crops. Thus, the use of binary formulations of essential oils with fixed oils can be an alternative to reduce the volatility of essential oils, in addition to being sustainable since fixed oils are waste reuse products. In this work, binary formulations of Lippia gracilis and Melaleuca leucadendra essential oil were prepared with the fixed oil of Spondias mombin, seeking to verify their insecticidal properties against Plutella xylostella larvae. The insecticidal activity was evaluated by the Average Lethal Concentration (LC₅₀) test of the essential oils against the pest, as well as the formulations with the fixed oil were prepared based on this concentration and analyzed under a volatilization time interval. The results showed that the essential oils of L. gracilis and M. leucadendra were toxic to larvae using LC₅₀ equal to 10.17 μL/mL and 11.06 μL/mL, respectively, while the fixed oil did not demonstrate toxicity. In addition, the toxicity of essential oils is less toxic over time, while the binary formulations have a longer duration of action. The analysis allowed concluding that the formulated mixtures have a toxic action for P. xylostella even after 96 hours in volatilization, showing promise for use in Integrated Pest Management (MIP).

COMMITTEE MEMBERS:
Presidente - CLAUDIO AUGUSTO GOMES DA CAMARA
Interno - JOAO RUFINO DE FREITAS FILHO
Externa à Instituição - CAROLINA ALVES DE ARAUJO
Externo à Instituição - JOAO PAULO RAMOS DE MELO