Compositions and methods are provided for synergistic pesticidal mixtures comprising a first pesticidal composition and a second pesticidal composition, wherein the pesticidal activity of the mixture exhibits synergistic effects compared with the expected effects of the mixtures based on the sum of the activity of the first pesticidal composition alone and the activity of the second pesticidal composition alone, wherein the pesticidal activity of the mixture allows the use of lower amounts of each component to achieve a desired level of control of the target pest, and/or provides a desired level of control of the target pest sooner after application of the mixture, compared with the amount and/or time required for first pesticidal composition alone, and the amount and/or time required for the second pesticidal composition alone, to achieve the same level of control. Synergistic pesticidal mixtures and methods according to the invention are provided comprising a first pesticidal composition comprising at least two essential oils, a carrier oil, and an emulsifier, and a second pesticidal composition comprising at least one insecticide, wherein the pesticidal activity of the mixture is greater than the sum of the activity of the first pesticidal composition alone and the activity of the second pesticidal composition alone. Methods are provided for screening and identifying synergistic pesticidal mixtures according to the invention.La presente invención se refiere a composiciones y métodos para mezclas pesticidas sinergísticas que comprenden una primera composición pesticida y una segunda composición pesticida, en donde la actividad pesticida de la mezcla exhibe efectos sinergísticos comparados con los efectos esperados de las mezclas con base en la suma de la actividad de la primera composición pesticida sola y la actividad de la segunda composición pesticida sola, en donde la actividad pesticida de la mezcla permite el uso de cantidades inferiores de cada componente p
