D.I.Y. INSECTICIDAL SOAP RECIPE

Courtesy of the Milwaukee Bonsai Society Newsletter.

Pour 1-2 tablespoons of original Dawn dishwashing detergent and 1 tablespoon of vegetable oil in a gallon jug.
Slowly add water to fill the jug.
Pour part of this solution into a spray bottle and add 2 capfuls of rubbing alcohol.

Use immediately.

If there is any solution left in the spray bottle, add 2 more capfuls of alcohol the next time you want to spray your trees.
It seems that the contents of the gallon jug (soap and vegetable oil solution) can be stored for months without it going bad.

Spray on plants covering all leaf and stem surfaces.
You may have to spray from 3 - 4 times with intervals of 3 days.
Almost any kind of pest, including scale, can be eliminated using this solution.
It is not necessary to wash off the spray as no adverse reactions have been found.