Spittlebug

There are some 23,000 species of spittlebugs. Yet most gardeners have never seen one. That’s because spittlebugs are very good at hiding. That mass of froth you see on your plant isn’t there to do your plant harm. It’s a very clever cover for the spittlebug. You don’t think so? Just try and find him.
Spittlebug nymphs can turn a liquid secretion into bubbles by moving or pumping their bodies. Once the bubbles have formed, spittlebugs use their hind legs to cover themselves with the froth. The ‘spittle’ serves multiple purposes.