Atividade inseticida do 車leo essencial de pimenta longa (Piper hispidinervum C. DC.) sobre lagarta-do-cartucho do milho Spodoptera frugiperda (J. E. Smith, 1797) (Lepidoptera: Noctuidae)

作者：Lima; Rafaela Karin; Cardoso; Maria Graas; Moraes; Jair Campos; Melo; Bruno Almeida; Rodrigues; Vanessa Gregorio; Guimares; Paula Lasmar

来源：Acta Amazonica, 2009, 39(2): 377-382.

DOI：10.1590/S0044-59672009000200016

• fall armyworm
• safrole
• integrated pest management.

the objectives of this research were to evaluate the chemical composition and bioactivity of the essential oil from the long-pepper leaves (piper hispidinervum) and its effect on the comportment and/or mortality of the fall armyworm (spodoptera frugiperda). the essential oil was obtained by steam stream distillation, using the modified clevenger apparatus, the chemical composition was analyzed by gc-ms and gc. tests of ingestion and topical application in fall armyworm of 1 st and 3 rd 赤nstar were made. the results showed that the long-pepper essential oil has insecticide activity on s. frugiperda, causing mortality and food reduction, and safrole (82%) as its majority constituent. mortality was found in the ingestion test in larvae of 1 st 赤nstar lc50 = 16.2 mg/ml for larvae of 3 rd 赤nstar lc50 = 9.4 mg/ml, with reduced food cd50 = 0.72 mg/ml; and acute toxicity test of the contact topic with ld50 = 277.91 米g/larvae, after an interval of 96 hours, neurotoxicity symptoms were also observed, as knock-down effect.