Insecticidal Soap Recipe
Combine 1 tablespoon of a dishwashing liquid with 1 cup of
vegetable oil to make a concentrate.
When ready to apply, add 1 tablespoon concentrate to 1 cup of
water and spray it on the plants.
It's important to experiment with the solution first. You may decide
to dilute the concentration because you can easily burn the
plants.
Note: On white flies the oil will suffocate the flies and their eggs.
The soap will help to break down the waxy covering on their
bodies making them more susceptible to disease and their natural
predators.