| Autor: |
Oliveira JAC; Department of Agriculture, Federal University of Lavras, Lavras 37203-202, Brazil., Fernandes LA; Department of Agriculture, Federal University of Lavras, Lavras 37203-202, Brazil., Figueiredo KG; Departament of Entomology, Federal University of Lavras, Lavras 37203-202, Brazil., Corrêa EJA; Minas Gerais Agricultural Research Company (EPAMIG), Pitangui 352650-000, Brazil., Lima LHF; Exact and Biological Science Department, Federal University of São João del Rei, Sete Lagoas Campus, Sete Lagoas 35701-970, Brazil., Alves DS; Agronomy Course Coordination, Federal Technological University of Paraná, Santa Helena 85892-000, Brazil., Bertolucci SKV; Department of Agriculture, Federal University of Lavras, Lavras 37203-202, Brazil., Carvalho GA; Departament of Entomology, Federal University of Lavras, Lavras 37203-202, Brazil. |
| Abstrakt: |
Spodoptera frugiperda control methods have proved to be inefficient, which justifies the search for new control measures. In this search for botanical insecticides for controlling S. frugiperda , the following were evaluated: (i) the toxicity of essential oils (EOs) from Cinnamodendron dinisii , Eugenia uniflora , and Melaleuca armillaris ; (ii) the effect of EOs on life table parameters against S. frugiperda ; (iii) the chemical characterization of EOs; and (iv) the in silico interaction of the chemical constituents present in the three EOs with the molecular targets of S. frugiperda . The EO from E. uniflora had the lowest LD 50 (1.19 µg of EO/caterpillar). The major compounds bicyclogermacrene (18.64%) in C. dinisii and terpinolene (57.75%) in M. armillaris are highly predicted to interact with the octopamine receptor (OctpR). The compound 1,8-cineole (21.81%) in M. armillaris interacts mainly with a tolerant methoprene receptor (MET) and curzerene (41.22%) in E. uniflora , which acts on the OctpR receptor. Minor compounds, such as nerolidol in C. dinisii and β-elemene in E. uniflora , are highly ranked for multiple targets: AChE, MET, OctpR, and 5-HT1. It was concluded that the EO from E. uniflora negatively affects several biological parameters of S. frugiperda development and is promising as an active ingredient in formulations for controlling this insect pest. |
