Monterey Horticultural Oil works as a fungicide and insecticide. Year-Round-Usage Dormant & Growing Season oil. All-in-one horticultural oil provides a barrier protection against garden and orchard pest such as scale, aphids, leafminers, thrips, whiteflies along with other soft bodied insects. Also protects against fungal diseases such as rust and powdery mildew. Solution should completely cover the upper and under sides of leaf canopy until run off. Our 1 quart ready horticultural oil has a ready to spray nozzle for easy to use and easy attachment to a garden hose with out the worry of mixing, it does it for you. Outdoor use only. Should never be sprayed in high temperatures. 1 pint concentrate, 1 quart ready to spray nozzle and 1 gallon sizes available.