Larvicidal, ovicidal and antifeedant activities of essential oils and constituents against Spodoptera frugiperda.
This work describes the chemical composition and bioactivity of essential oils and selected compounds belonging to the families Piperaceae, Myrtaceae and Rutaceae. GC-MS analysis of the oils enabled the identification of safrole, Dill apiole, (E)-nerolidol, 1,8-Cineole, Citronellal and limonene as major constituents of the oil of the Piper divaricatum, Piper aducum, Melaleuca, Eucalyptus globulus, Eucalyptus citriodora and Citrus, respectively. Among the essential oils tested, P. aduncum was the most toxic by residual contact, topical and ovicide assay on Spodoptera frugiperda. Among the chemical compounds, safrole was the most toxic by residual contact whereas citronellal was the most toxic in the topical assay and ovicidal activity. The antifeedant activity was found for the oils from Piper, Melaleuca, Syzygium, C. aurantiifolia var amara, C. limon and Safrol. This work showed that Piper oils are the most promising for future use for the control of S. frugiperda.