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White oil is a homemade insecticide spray used for controlling a wide range of insect pests in the garden. The spray works by blocking the breathing pores of insects, causing suffocation and death. It is effective in the control of aphids, scale, mealybug, mites, citrus leaf miner and smooth skinned caterpillars.
The quantities vary depending on the source, but a typical mixture is 4 parts of vegetable oil (a non-mineral oil) to one part of dish-washing detergent (for washing by hand). It may be blended in a mixer until homogeneous to be stored. Diluting 1:50 with water may be used for spraying leaves from above and below.
- Smythe, Rob. "Canola White Oil - 'Oils ain't Oils Soll!'" Bromeliad Encyclopedia, Florida Council of Bromeliad Societies. Retrieved April 28, 2017.
- Coleby-Williams, Jerry (June 21, 2008). "Fact Sheet: Horticultural Oils". Gardening Australia. Australian Broadcasting Corporation. Retrieved January 28, 2013.
- Thomson, Sophie (2014). "Fact Sheet: How To Manage Citrus Trees". Gardening Australia. Australian Broadcasting Corporation.
- "Natural Garden Pest Control: White oil For Pest Control". Private Exterminator. November 8, 2015.