Horticultural Oil
Use to suffocate insects, especially on fruit trees, which can't be treated with insecticides.
You can make the oil from diluted vegetable oil (using a small quantity of detergent to allow the oil and water to mix).
- 1 cup vegetable oil
- 1 tablespoon dish washing liquid
Mix 1 tablespoon with 2 cups of water. Fill a spray bottle and shake well.