Abstract
Essential oil (EO) from aerial parts of Eupatorium adenophorum Spreng was extracted by steam distillation and characterized by Gas chromatography (GC) and gas chromatography–mass spectrometry (GC-MS). α-epi-cadinenol (16.63%), O-cymene (13.54%), bornyl acetate (7.70%), β-phellandrene (7.46%), and σ-2-carene (5.77%) were the major terpenoids. The EO showed promising toxicity (median lethal concentration, LC50 = 3176.54 mg L−1) and repellent activity (median repellent concentration, RC50 = 2070.99 mg L−1) to larvae of Plutella xylostella within 24 h. Among fractions, hexane fraction was more effective to P. xylostella (LC50 = 5056.74 mg L−1), whereas methanol fraction to Aphis craccivora (LC50 = 1175.83 mg L−1).
Acknowledgements
The first author is grateful to The Academy of Sciences for the Developing World (TWAS) for their financial and material support through the CSIR-TWAS Post-Doctoral Research Fellowship. The authors would also like to thank Director, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh (India). IHBT Communication Number for the article is 3875.
Disclosure statement
No potential conflict of interest was reported by the authors.