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How to Manage Pests

The UC Guide to Healthy Lawns

Identification key to weeds

Use this key to identify your weed species

This key includes the most common weeds found in California lawns. Other species may occur but are not of major importance in turf. Because flowering parts are often mowed and not seen in turf, this key was developed using vegetative characteristics. Identifying weed species is essential for choosing appropriate management practices.

  • Click on illustrations that resemble your weed.
  • Work through the key until you get to a summary page of your weed.
  • Link to Pest Notes from many summary pages to see specific management practices.

Begin key

Identification tips

Already know your weed problem? Go directly to your species:

Statewide IPM Program, Agriculture and Natural Resources, University of California
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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 our Home page, or in the U.S., contact your local Cooperative Extension office for assistance.

Agriculture and Natural Resources, University of California

Accessibility   /TOOLS/TURF/PESTS/weedkey.html revised: June 21, 2016. Contact webmaster.