Mealybugs on holly
Local master gardener recommended solution of 1/2 cup vinegar, 2 tbsp dish detergent to 1 gallon water and spray plants. Web site said to use one part alcohol to three parts water with a little liquid dish soap. Which one is correct? Use early in the day? OK to use in hot weather?
I have listed a few links for you.
Recipes are in the link for a homemade insecticidal soap.
Neem Oil is a great treatment you may also consider.