What is the white fluffy stuff on my shrubs?

I get lots of gardening questions from visitors when I am working in my pollinator garden at Chatham Mills. Several people have asked me what is the white fluffy stuff they are seeing on the stems of shrubs. I have also seen quite a bit of this “problem” at the pollinator garden. At first I thought they were mealybugs but upon closer inspection I discovered they were nymphs of the flatid planthopper.