Potential use of essential oils from and to control Koch (Acari: Tetranychidae) on two host plant species.

Plant extracts and essential oils are considered alternatives to synthetic chemicals with toxic effects on insects and mites. Acaricidal, repellent, and oviposition effects of commercially available essential oils of L. (Lamiaceae) and (L.) (Myrtaceae) were investigated in this study on Koch (Acari: Tetranychidae), one of the main pests in agriculture, on two host plant species using leaf disc bioassays. essential oil showed higher toxicity to protonymphs and adult females inhabiting both bean and tomato leaves than essential oil. The LC values of essential oil were found to be 1.67 and 2.05 µl L air for the bean populations in protonymphs and adult females and 1.87 and 3.07 µl L air for the tomato populations, respectively. Five percent concentration of essential oil had the highest repellent effect on the bean population of after 1, 24, and 48 h, resulting in 61.22%, 40.81%, and 18% repellence, respectively. Although showed higher toxic effects, was a better repellent against the bean population of . The mortality rates of adult females of treated with either or essential oil increased with the increasing concentration and time on both host plants. Both essential oils caused a decrease in egg number and larvae hatching in both bean and tomato populations of . In the light of the results obtained, and essential oils have the potential to be used in the control programs against in both host plants.