I have never mixed the two and cannot answer that question. I think a product called AzaMax would be more effective. It is non toxic to both the humans and the plants. In my experience I have not had much success with insecticidal soap and alcohol is only effective on small infestations. Best And Happy Yardening, Nancy.
How To Treat Scale On Liriope
Question From: L. Duryea - TEXAS
Q: What is the percentage amounts of "alcohol and insectidical soap" do you use to treat scale on liriope?