Understanding and Reporting White Foam on Plants

Experts have warned gardeners not to touch the white foam, known as 'cuckoo spit', produced by the Spittlebug, as it could spread a plant disease called Xyella that would destroy plants within a 100m radius. Scientists have asked people to report any sightings of the bug or the froth it leaves to track what causes it. However, the insects feed on the plants but don't harm them or humans, so gardeners don't need to remove the spittle or the bug.