You can spray azaleas with Volck Oil Spray. The manufacturer says it may be applied to shrubs, but warns not to use it on maidenhair ferns, red maples, Japanese maples or non-woody plants.
About this Author
Aileen Clarkson has been an award-winning editor and reporter for more than 20 years, earning three awards from the Society of Professional Journalists. She has worked for several newspapers, including "The Washington Post" and "The Charlotte Observer." Clarkson earned a Bachelor of Arts in journalism from the University of Florida.