Journal
JOURNAL OF ESSENTIAL OIL RESEARCH
Volume 20, Issue 2, Pages 179-182Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/10412905.2008.9699985
Keywords
Croton grewioides; Euphorbiaceae; essential oil composition; (E)-anethole; (E)-methyl isoeugenol; methyl eugenol; insecticidal activity; Zabrotes subfasciatus
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The essential oils of leaves and stems of Croton grewioides Baill. of the agreste region of Pernambuco, Brazil, were obtained by hydrodistillation and analyzed by GC and GC/MS. Twenty-two components were identified, which represented 99.8% and 98.6% of the total constituents in the leaf and stem oil, respectively. Croton grewioides produced an oil with a predominance of phenylpropanoid compounds, whose principal component was (E)-anethole (65.5% in the leaf and 47.8% in the stem). Other major components found in the leafoil were methyl eugenol (10.6%) and (E)-methyl isoeugenol (4.7%). Other components identified in the stem oil were (E)-methyl isoeugenol (30.0%), cadalene (8.4%) and methyl eugenol (4.6%). The insecticidal activity of C. grewioides was evaluated against Mexican bean weevils, Zabrotes subfaciatus (Boheman) resulting in a LC50 for the leaf oil, which was 3.4 times less than that obtained from the stem oil.
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