Abstract
ABSTRACTWe surveyed the mite fauna on three vegetable crops (cucumber, eggplant, and pepper) in plastic-houses throughout the autumn of 2020 by taking weekly leaf samples. These samples revealed several plant-feeding and predatory mites belonging to 13 species in ten genera and five families, as well as some insect pests. Tetranychus urticae Koch (Tetranychidae) was a significant pest in all three crops and Integrated Pest Management (IPM) control was used for its control. A bioassay was performed to evaluate the effect of a mixture of essential oils (clove, lavender, eucalyptus, and sweet orange) on T. urticae and its associated predator, Phytoseiulus persimilis Athias-Henriot (Phytoseiidae). The lethal concentration of this essential oil mixture determined by laboratory bioassay, was used on eggplant and cucumber crops in plastic-houses. The active ingredients of the tested oil mixture were determined using GC-MS analysis of the mixed essential oil. The total constituents of the mixed essential oil were identified as 43 compounds, primarily d-limonene, but also monoterpenes, sesquiterpens, diterpens, sestetraterpens, triterpens, and tetraterpens.
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