اثر برخی اسانس‌های گیاهی و آبامکتین در کنترل کنه تارتن دو لکه ای خیار،Tetranychus urticae Koch (Acari: Tetranychidae)

Cucumber with the scientific name of Cucumis sativus L. is one of the most important dicotyledonous plants. One of the most important pests of cucumber is the two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae). Due to the increasing prevalence of chemical acaricides and environmental pollution and its adverse effects and the occurrence of the phenomenon of pest resistance, research has been conducted to find low-risk and plant compounds. The problems caused by the use of chemical insecticides have increased efforts to find effective, safe and functional alternative compounds. The use of herbal insecticides due to their lower toxicity to humans, fast decomposition, their suitability for small-scale applications and their wide range of effects compared to chemical insecticides, which cause a long shelf life in nature and environmental pollution are preferred. In this study, three essential oils of the galbanum (Ferula gummosa), lemongrass (Cymbopogon citratus) and the common sage (Salvia officinalis) and comparison of the best essential oil with abamectin acaricide on the two-spotted spider mite, T. urticae in laboratory conditions, 25±2°C, 60±5% relative humidity and 16L:8D h photoperiods. Plant compounds of each of the above essential oils were identified using GC/MS. The galbanum essential oil contains 25 compounds, 2-beta-pinene (40.6%), lemongrass 31 compounds, 2,6-Octadienal, 3,7-dimethyl (E) (26.638%) and the common sage 30 compounds, Alpha Pinene (30.1%) were major chemical compounds. The values of LC50 calculated on the adult stage of spider mite was 2419.1 µl/L for galbanum, 3531.7 µl/L for lemongrass, 956.9 µl/L for sage and 10.99.4 µl/L for abamectin. According to LC50, the two-spotted spider mite showed the highest sensitivity to the common sage essential oil among the three essential oils used.