期刊
FITOTERAPIA
卷 74, 期 7-8, 页码 670-676出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0367-326X(03)00186-2
关键词
Streblus asper; insecticidal activity
Extracts from the stem bark of Streblus asper possess insecticidal activity against the fifth instar of Dysdercus cingulatus. Methanolic extract showed an LC50 value of 5.56 mug/insect. Partition with chloroform increased the insecticidal activity (LC50 2.01 mug/insect). Three polyphenolic rich fractions were obtained from silica-gel column chromatography of the chloroform fraction and found to have noteworthy insecticidal activity (LC50: 1.82 mug, 2.70 mug, 2.26 mug/insect) by topical application. This may provide a useful beginning for the development of biopesticides. (C) 2003 Elsevier B.V. All rights reserved.
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