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Title: Activity of vetiver extracts and essential oil against Meloidogyne incognita
Authors: Kansiree Jindapunnapat
Nathan D. Reetz
Margaret H. MacDonald
Ganga Bhagavathy
Buncha Chinnasri
Noppamas Soonthornchareonnon
Anongnuch Sasnarukkit
Kamlesh R. Chauhan
David J. Chitwood
Susan L.F. Meyer
Kasetsart University
Mahidol University
USDA ARS Beltsville Agricultural Research Center
Keywords: Agricultural and Biological Sciences
Issue Date: 1-Jan-2018
Citation: Journal of Nematology. Vol.50, No.2 (2018), 147-162
Abstract: © The Society of Nematologists 2018. Vetiver, a nonhost grass for certain nematodes, was studied for the production of compounds active against the southern root-knot nematode, Meloidogyne incognita. In laboratory assays studying the effects on second-stage juvenile (J2) activity and viability, crude vetiver root and shoot extracts were nematotoxic, resulting in 40% to 70% J2 mortality, and were also repellent to J2. Vetiver oil did not exhibit activity against J2 in these assays. Gas chroma-tography-mass spectrometry analyses of three crude vetiver root ethanol extracts and a commercial vetiver oil determined that two of the major components in each sample were the sesquiterpene acid 3, 3, 8, 8-tetramethyltricyclo[, 4)]oct-5-ene-5-propanoic acid and the sesquiterpene alcohol 6-isopropenyl-4, 8a-dimeth yl-1, 2, 3, 5, 6, 7, 8, 8a-octahydronaphthalen-2-ol. The acid was present in higher amounts in the extracts than in the oil. These studies demonstrating nematotoxicity and repellency of vetiver-derived compounds to M. incognita suggest that plant chemistry plays a role in the nonhost status of vetiver to root-knot nematodes, and that the chemical constituents of vetiver may be useful for suppressing nematode populations in the soil.
ISSN: 0022300X
Appears in Collections:Scopus 2018

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