Chemical composition of essential oil and oleoresins of Zingiber officinale and toxicity of extracts/essential oil against diamondback moth (Plutella xylostella)

Abstract

Essential oil (EO) of ginger and oleoresins isolated from extraction solvents by GC–MS. Zingiberene was the major constituent in all the samples, and ethanol could extract the maximum quantity (21.2%) from the dried de-oiled cake (EDD) followed by EO (20.3%) as compared to oleoresins. Hydro-distilled EO contains higher oxygenated monoterpenes (22.4%) than oleoresins. EDD showed more toxicity to larvae of Plutella xylostella (LC₅₀ = 4957.9 mg L⁻¹) after 96 h and was followed by EDW (LC₅₀ = 5067.6 mg L⁻¹) and EF (LC₅₀ = 6631.2 mg L⁻¹). EO also showed promising efficacy (LC₅₀ = 5875.9 mg L⁻¹) and repellency (97.1%) against P. xylostella.

Keywords:

• Zingiber officinale
• essential oil
• chemical composition
• oleoresins
• insecticidal properties

Acknowledgments

The authors thank Director, Institute of Himalayan Bioresource Technology, Palampur and Council of Scientific and Industrial Research, New Delhi for support. The authors also thank Ms Vijaylatha Pathania for providing gas chromatograms and Mr Vivesh Sood and Mr Arvind Kant for technical support. IHBT communication number for this article is 4060.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by Department of Science and Technology, Ministry of Science and Technology [grant number NECTAR/(14)/DST/2013] and Council of Scientific and Industrial Research, New Delhi [grant number BSC–0213].