Monterey Garden Insect Spray uses Spinosad to effectively control thrips, leafminers, fire ants, diamond-back moths, borers and more. Gardeners mix four tablespoons of concentrated liquid Monterey Garden Insect Spray to one gallon of water (or as much is needed for a single treatment) for easy foliar applications. Derived through fermentation of a naturally-occurring soil bacterium, this fast-acting insecticide is listed by the Organic Materials Review Institute (OMRI) and can be used on fruit and vegetable crops, ornamentals and turf.