Author(s):
Roque, Nídia Franca ; Lago, João Henrique G. ; Soares, Marisi G. ; Pereira, Luciane G. Batista- ; Silva, M. Fátima G. F. ; Corrêa, Arlene G. ; Fernandes, João B. ; Vieira, Paulo Cezar ; Roque, Nídia Franca ; Lago, João Henrique G. ; Soares, Marisi G. ; Pereira, Luciane G. Batista- ; Silva, M. Fátima G. F. ; Corrêa, Arlene G. ; Fernandes, João B. ; Vieira, Paulo Cezar
Date: 2013
Origin: Oasisbr
Subject(s): Guarea macrophylla tuberculata; Meliaceae; Hypsipyla grandella; Pyralidae; Mahogany shoot borer; Electroantennography; Volatile oils
Description
Texto completo: acesso restrito. p.589–594
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GC and GC–MS analyses of the volatile oils from Guarea macrophylla (Meliaceae) collected during three different periods in one year (February, June and October) indicated a seasonal variation in chemical composition. Whilst sesquiterpenes were the predominant class of components present in the leaf oil, a seasonal dependent variation in the degree of oxygenation of these compounds was detected, which seemed to be associated with phenological factors. The leaf oil, and fractions thereof, were subjected to GC coupled with electroantennographic detection employing antennae of females of Hypsipyla grandella, an insect pest that attacks several meliaceous species. Five compounds elicited significant responses and these were identified as ledol, 1-cubenol, guai-6-en-10β-ol, 1-epi-cubenol, and τ-muurolol. The results suggest that these components could be responsible for the attraction of H. grandella to G. macrophylla.
