6e7fe60a_Management_in_the_Home_Orchard__Uses
[Insecticide] Oils [Class] Mostly petroleum based [Uses] 
Often referred to as horticulture oils or dormant oils. Oils have been used for >100 years to control scales and other pests of fruit trees. Applied as a dormant application it should be used at a 3% solution. Some highly refined or light weight formulations can be used after bloom, but should only be used at a 1% solution. Do not use in combination with or at least 10 days before or after a fungicide that contains sulfur or captan is applied, or severe leaf burn will occur.
The North Carolina Plant Disease and Insect Clinic | Disease and Insect Management in the Home Orchard
Uses