Laboratory Bioassay for the Efficacy of Coriander and Rosemary Extracted Essential Oils on the Citrus Brown Mite, Eutetranychus orientalis (Actinidida: Tetranychidae)

Elhalawany, Ashraf Said; Abou-Zaid, Aziza M.; Amer, Ahmad I.

doi:10.21608/ajesa.2019.164149

Laboratory Bioassay for the Efficacy of Coriander and Rosemary Extracted Essential Oils on the Citrus Brown Mite, Eutetranychus orientalis (Actinidida: Tetranychidae)

Document Type : Original research articles

Authors

¹ Fruit Trees Mites Dept., Plant Protection Research Institute, ARC, Dokki, Giza, Egypt.

² Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt

10.21608/ajesa.2019.164149

Abstract

The objective of this study was to evaluate the toxicity and repellency effect of Rosemary, Rosmarinus officinalis L. (herb) and Coriander, Coriandrum sativum L. (fruits) essential oils against Eutetranychus orientalis (Klein). Essential oils were extracted using aqueous extract. The chemical composition of the extracted essential oils was characterized by GC. The main components were Linalool and camphor, respectively. Concentrations of 0.5, 1, 2, 3 and 4% were tested. Results indicated significant differences in efficiency of the tested essential oils on the developmental stages of E. orientalis. Coriander essential oil was more toxic for controlling different stages of E. orientalis than Rosemary ones. For eggs, LC50 and LC90 were 4.82%, while for Rosemary; it was 1.49 and 7.94%, respectively after 7 days. Relative values after 3 days for larval stage were: 0.160, 1.340, 0.280 and 20.080 respectively. For nymphal stage relative values were:
0.21, 1.52, 0.20 and 4.37. For adult stage relative values were: 0.77, 4.09, 0.37 and 6.10, respectively. It was concluded that Coriander essential oil was more potent to E. orientalis than Rosemary ones. Repellency of different tested concentrations for adult females indicated significant effects of the two oils, concentration and time. Coriander was significantly more repellant than Rosemary. Repellency significantly increased with concentration increased and decreased by time increase. It was concluded that Coriander and Rosemary essential oils could potentially used for the management of E. orientalis. More efforts are suggested to evaluate these oils and their components as natural ones for controlling this pest.

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