Germination of various weed species in response to vetiver oil and nootkatone

Germination experiments were conducted in petri dishes to test the effect of vetiver oil and one of its minor components, nootkatone, on six common weed species. Vetiver oil inhibited germination of redroot pigweed, common lambsquarters, giant ragweed, pitted morningglory, and velvetleaf. Nootkatone...

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Bibliographic Details
Published in:Weed technology 2004-04, Vol.18 (2), p.263-267
Main Authors: Mao, L, Henderson, G, Laine, R.A
Format: Article
Language:English
Subjects:
Allelopathy
Biological and medical sciences
Chemical control
Chrysopogon zizanioides
Essential oils
Fundamental and applied biological sciences. Psychology
Germination
Herbicides
Parasitic plants. Weeds
Phytopathology. Animal pests. Plant and forest protection
plant fats and oils
Plants
Seed germination
Seedlings
Sesquiterpenes
Subterranean termites
Sustainable agriculture
Weeds
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Summary:Germination experiments were conducted in petri dishes to test the effect of vetiver oil and one of its minor components, nootkatone, on six common weed species. Vetiver oil inhibited germination of redroot pigweed, common lambsquarters, giant ragweed, pitted morningglory, and velvetleaf. Nootkatone, at much higher concentrations than it occurs in the oil, exhibited germination inhibition for all weed species except velvetleaf. Redroot pigweed was the most sensitive species with germination inhibition at 0.1 to 1.0 mg/ml of vetiver oil and nootkatone. At 1.0 to 8.0 mg/ml, nootkatone reduced germination of giant ragweed by 24 to 92%, whereas vetiver oil reduced the germination only by 6 to 11%. Vetiver oil and nootkatone also inhibited seedling expansion of redroot pigweed and common lambsquarters. No significant inhibition of germination and seedling expansion was found for sicklepod. These laboratory studies provide preliminary evidence that nootkatone and vetiver oil may have use as herbicides.
ISSN:0890-037X
1550-2740
DOI:10.1614/WT-03-034R2