Three essential and five vegetable oils were further tested
using fruit (apple) at a concentration of 10 mL/L. Certifiedorganic apples were purchased, rubbed with ethanol, and then
washed with water. Palm oil was heated by microwave for
1 min prior to use. An emulsion of each oil in water was made
with the addition of a surfactant (Dow Corning Q2-5211 super
wetting agent) at a concentration of 8 mL/L. Each essential
oil and vegetable oil solution was then sprayed onto an apple
(5 mL/fruit) with a hand sprayer. Control apples were sprayed
with water containing surfactant. The treated fruits were airdried for 15 min.