Volatile, non-volatile composition and insecticidal activity of Eupatorium adenophorum Spreng against diamondback moth, Plutella xylostella (L.), and aphid, Aphis craccivora Koch

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).