Journal
JOURNAL OF PEST SCIENCE
Volume 87, Issue 2, Pages 341-349Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10340-013-0542-6
Keywords
Eupatorium adenophorum; Essential oil; Antifungal activity; Antibacterial activity; Phytotoxicity; Antioxidant activity
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Funding
- National Innovative Agricultural Project (NAIP), Indian Council of Agricultural Research, New Delhi, India
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Essential oils from inflorescences and roots of Eupatorium adenophorum Spreng (Asteraceae) have been investigated for their antimicrobial, phytotoxic and antioxidant activities. Based on GC-MS, the oil from inflorescences is dominated by sesquiterpenes (55.9 %) with gamma-cadinene (18.4 %), gamma-muurolene (11.7 %), 3-acetoxyamorpha-4,7(11)-diene-8-one (7.4 %) and bornyl acetate (6.3 %) as the major constituents. The oil obtained from the roots contained both sesquiterpenes (34.3 %) and monoterpenes (32.5 %) in almost equal proportions with E,E-cosmene (19.9 %), gamma-muurolene (10.1 %), isothymol (7.5 %), beta-cadinene (7.0 %) and alpha-phellandren-8-ol (5.9 %) as the major constituents. Both oils exhibited significant antifungal activity against five phytopathogenic fungi. The inflorescence oil showed higher antibacterial activity against Klebsiella pneumoniae, while the root oil was more effective against Staphylococcus aureus. The oils strongly inhibited or delayed germination and seedling growth of the weed Phalaris minor in a dose-dependent manner. As evidenced by a DPPH assay, the essential oils also exhibited significant free radical scavenging activity.
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