How to Manage Pests

Pests in Gardens and Landscapes


Spittlebugs occur throughout the U.S. and can at least occasionally be found on almost any plant. Adult spittlebugs are inconspicuous, often greenish or brownish insects, about 0.25 inch long. Immature spittlebugs are recognized by the frothy white mass that nymphs surround themselves with on plant tissue where they feed.

Identification of species | Life cycle


Spittlebugs suck plant juices. Heavy infestations distort plant tissue and slow plant growth. The obvious and occasionally abundant masses of white foam on cones, foliage, or stems may be annoying, but the spittlebugs do not seriously harm established woody plants.


Spittlebugs can be tolerated; they do not usually cause significant damage. Handpick or wash off with water.  Spittlebugs are more likely to become abundant on woody plants when they migrate from nearby herbaceous species. Cut weeds or wash spittlebugs off these alternate hosts in the spring, before the insects mature and can spread.

Adult spittlebug
Adult spittlebug

Frothy material hides immature spittlebugs
Frothy material hides immature spittlebugs

Statewide IPM Program, Agriculture and Natural Resources, University of California
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Agriculture and Natural Resources, University of California

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