Azalea Disease

Question

I noticed on some of the leaves of my azaleas there are semi-hard white “foamy substances” growing on the leaves and want to know what it is and how to treat. Thank you.

Answer 1

It sounds like spittle bugs to me. Here is more information: https://www.gardeningknowhow.com/plant-problems/pests/insects/spittlebug-control.htm