01761naa a2200265 a 450000100080000000500110000800800410001910000230006024501220008326000090020550001540021452007740036865300250114265300250116765300260119265300220121865300230124065300270126370000200129070000300131070000190134070000200135970000230137977300930140211257212023-03-30       2008    bl uuuu     u00u1 u    #d1 aTRINDADE, R. C. P.  aMortality of Plutella xylostella larvae treated with Aspidosperma pyrifolium ethanol extracts.h[electronic resource]  c2008  aNotas científicas. Título em português: Mortalidade de larvas de Plutella xylostella tratadas com extratos etanólicos de Aspidosperma pyrifolium.  aThe objective of this work was to assess the effects of Aspidosperma pyrifolium ethanol extracts on cabbage moth (Plutella xylostella) larvae. The ethanol extracts of the stem bark, fruits and roots of A. pyrifolium were obtained by classical phytochemical methods, and the resulting subfractions were tested on P. xylostella, using 4 and 5 mg L-1. The crude ethanol extract of the stem bark was more lethal. The alkaloid-rich aqueous subfraction derived from the stem bark extract caused 100% larval mortality at 4 mg L-1. Insecticidal activity was associated with the presence of the monoterpenoid indole alkaloids aspidofractinine, 5-demethoxypyrifoline, and N-formylaspidofractinine. These alkaloids presented excellent insecticidal roperties against P. xylostella.  aAcephala Alcalóides  aAtividade Inseticida  aBrassica oleracea var  aExtrato orgânico  aPereiro-do-sertão  aTraça-das-crucíferas1 aSILVA, P. P. da1 aARAÚJO-JÚNIOR, J. X. de1 aLIMA, I. S. de1 aPAULA, J. E. de1 aSANT'ANA, A. E. G.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 43, n. 12, p. 1813-1816, dez. 2008.