Concentrated organic pesticide compositions have active ingredients of two plant essential oils, cedar oil and peppermint oil, which synergistically act as arthropod repellants, and 2-phenethyl propionate, which kills arthropods on contact. Inert adjuvant ingredients are ethyl lactate, a surfactant, and sodium lauryl sulfate, an emulsifier, both of which facilitate dispersion of the oils in water. Dilution of the concentrated compositions with water for spray application is preferably at a ratio of about 1:640 by volume. All ingredients comply with USEPA/FIFRA regulations for minimum risk pesticides.
