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How to Manage Pests

Pests in Gardens and Landscapes

Leafhoppers

Leafhoppers are small slender insects that disperse rapidly when disturbed. They run sideways and are good jumpers. They are wedge shaped, less than 0.25 inch long as adults, and generally are varying shades of green, yellow, or brown and often mottled.

Identification of species | Life cycle

Damage

Pale stippling on upper surfaces of leaves is characteristic of leafhopper damage. Bleached areas may enlarge until the leaf becomes mottled or dies, turns brown, and falls. Small white cast skins may be present. Fruit may be covered with dark, sticky drops of excrement.

Solutions

Leafhoppers are usually not enough of a problem in home vineyards to justify chemical control measures. Remove weeds in surrounding areas to prevent the buildup of leafhopper populations that might disperse to new grape foliage. Rely on natural enemies. Insecticidal soaps can be used if necessary.

Grape leafhopper adult
Grape leafhopper adult
Leafhopper spotting
Leafhopper spotting
Sooty mold on leaf
Sooty mold on leaf

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2009 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See How to manage pests, or in the U.S., contact your local Cooperative Extension office for assistance. /PMG/GARDEN/FRUIT/PESTS/grapelfhopper.html revised: June 29, 2009. Contact webmaster.