Acaricidal Activity of Some Lamiaceae Plant Essential Oils against Tetranychus urticae Koch

Amer, Sanaa A.; Mohamed, Fatma S.; Kamel, A. M.; Darwish, Zakeya E.; Hussein, Huda E.; El-Desouky, Marwa E.

doi:10.21608/ajesa.2011.163601

Acaricidal Activity of Some Lamiaceae Plant Essential Oils against Tetranychus urticae Koch

Document Type : Original research articles

Authors

¹ Plant Protection Dept., National Research Center (N R C), Dokki, Giza, Egypt

² Invertebrates, Zoology Dept., Faculty of Sci., AL-A Zhar Univ., for Girls, Cairo, Egypt

³ Medicinal and Aromatic Plants Dept., NRC, Dokki, Giza, Egypt

10.21608/ajesa.2011.163601

Abstract

Three plant essential oils, namely, Mentha longifolia L., Salvia officinaiis L. and Dracocephalum rnoldavicae L. were analyzed by GC/MS and tested for their toxicity and repellency against the tetranychid mite Tetranychus urticae Koch. D. moldavicae proved to be the most effective against T. urticae followed by S. officinalis and M longifolia. The LC₅₀ values were 1.57 & 0.58; 2.24 & 3.33 and 2.85 & 3.52 for adults and eggs, respectively. However, all essential oils tested showed high repellency, shortened female longevity and oviposition period as well as reduction in the total number of deposited eggs. This result may be correlated to the differences in the chemical structure of these oils based on GC/MS analysis.

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