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Toxicity and repellent effect of essential oils and a major component against Lipaphis erysimi
Journal of Crop Protection
Essential oils (EOs) extracted from aerial parts of Aster indamellus Grierson, Calamintha umbrosa Benth. and Erigeron annuus (L.) Pres. were analyzed by GC, GC/MS. The major acetylenic constituent (cis-lachnophyllum ester) of E. annuus was isolated and characterized by 1 H and 13 C-NMR spectra. Their toxicity and repellent effect against Lipaphis erysimi was tested. Oils of E. annuus and C. umbrosa exhibited higher toxicity on direct spray and by fumigation. LC 50 value of E. annuus oil wasfatcat:5hzz6ry765gedff53y5y22va44