two spotted spider mite (tssm), tetranychus urticae koch, is an important pests on bean in markazi province (center of iran). to evaluate the bioacaricidal activity of extracts of three essential oils of thyme (thymus vulgaris), lavender (lavandula officinalis) and eucalyptus (eucalyptus camaldulensis) against t. urticae on cherry bean (vigna unguiculta subsp. sinensis), five different concent...