Mix 2 tablespoons of cooking oil and 2 tablespoons of baby shampoo in 1 gallon of water. Pour the mixture in a garden sprayer or hand sprayer.
Spray the homemade bug spray on a small, inconspicuous area of the plant and wait for two to three days. If you see no damage, it's safe to spray the rest of the plant.
Coat the aeonium -- including the undersides of the leaves and the central rosette -- thoroughly with the homemade insect spray. Reapply the treatment every five to seven days, if needed, with fresh solution.
Pour 1 gallon of soft water in a 5-gallon bucket. Add 2 1/2 fluid ounces of insecticidal soap and stir for several seconds until the water and soap are well mixed.
Fill a garden sprayer or hand sprayer with the diluted insecticidal soap. Spray the entire aeonium -- including the undersides of the leaves -- thoroughly with the solution to the point of runoff.
Repeat the treatment with fresh solution every seven to 14 days, if needed, until the pests are no longer a problem.