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Insect growth inhibition, antifeedant and antifungal activity of compounds isolated/derived from Zingiber officinale Roscoe (ginger) rhizomes
Author(s) -
Agarwal Manjree,
Walia Suresh,
Dhingra Swaran,
Khambay Bhupinder P S
Publication year - 2001
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.263
Subject(s) - rhizome , zingiber officinale , zingiberaceae , column chromatography , chemistry , rhizoctonia solani , antifungal , essential oil , stereochemistry , chromatography , botany , traditional medicine , biology , microbiology and biotechnology , medicine
Fresh rhizomes of Zingiber officinale (ginger), when subjected to steam distillation, yielded ginger oil in which curcumene was found to be the major constituent. The thermally labile zingiberene‐rich fraction was obtained from its diethyl ether extract. Column chromatography of ginger oleoresin furnished a fraction from which [6]‐gingerol was obtained by preparative TLC. Naturally occurring [6]‐dehydroshogaol was synthesised following condensation of dehydrozingerone with hexanal, whereas zingerone and 3‐hydroxy‐1‐(4‐hydroxy‐3‐methoxyphenyl)butane were obtained by hydrogenation of dehydrozingerone with 10% Pd/C. The structures of the compounds were established by 1 H NMR, 13 C NMR and mass (EI‐MS and ES‐MS) spectral analysis. The test compounds exhibited moderate insect growth regulatory (IGR) and antifeedant activity against Spilosoma obliqua , and significant antifungal activity against Rhizoctonia solani . Among the various compounds, [6]‐dehydroshogaol exhibited maximum IGR activity (EC 50 3.55 mg ml −1 ) while dehydrozingerone imparted maximum antifungal activity (EC 50 86.49 mg litre −1 ). © 2001 Society of Chemical Industry