Insecticidal Activity of 8 Essential Oils and Analysis of Chemical Composition of Dracocephalum moldavica by GC-MS

doi:10.16409/j.cnki.2095-039x.2020.02.017

Abstract

Abstract: Eight plant oils were extracted from wild plants usig steaming distillation in screening for new insecticides for storage pests. Essential oils were evaluated for insecticidal activities against Liposcelis bostrychophil using filter-paper film method and fumigation method. Three essential oils (Dracocephalum moldavica, Torilis scabra, and Humulus lupulus) showed strong contact toxicity against L. bostrychophila, with LD₅₀ values of 157.43, 349.34and 633.07 µg/cm², respectively. Three essential oils (D. moldavica, Artemisia selengensis and T. scabra) showed strong fumigant toxicity against the booklouse, with LC₅₀ values of 0.20, 0.70 and 1.66 mg/L, respectively. The essential oil from D. moldavica that exhibited the strongest contact and fumigant toxicity was analyzed by gas chromatography-mass spectrometry (GC-MS) for chemical composition. Twenty three compounds were identified, accounting for 84.22% of the total oil, principallygeranyl acetate (16.26%), eugenol (13.90%), citral (13.20%), 2-Ethylhexyl acrylate (8.55%), estragole (7.89%), and neral (7.60%). The above results indicate that the essential oil of D. moldavica has the potential to be developed as an insecticide for storage pests.

Key words: Liposcelis bostrychophila, Dracocephalum moldavica, essential oil, insecticidal activity

CLC Number:

S435

ZHAO Nana, LU Wei, GVLMIRA Amat, FU Wenjia, DU Shuya. Insecticidal Activity of 8 Essential Oils and Analysis of Chemical Composition of Dracocephalum moldavica by GC-MS[J]. Chinese Journal Of Biological Control, 2020, 36(2): 300-306.

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