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How to Manage Pests

The UC Guide to Healthy Lawns

Diagnostic key to problems in turfgrass

This key can help you to diagnose common insect or disease problems that may be occurring in your lawn. Use this key only after you have considered the possibility that your problem may be caused by an abiotic disorder or by poor management practices.

Step 1: Choose your turf species


Most lawns are mixtures of various grass species. Select the species of a grass plant on which you see symptoms. For help in identifying your turfgrass species, refer to the turfgrass key.

The diagnostic key covers only the major turfgrass problems seen on the primary turfgrass species grown throughout California. For a more complete list of pests and disorders that may occur on turfgrass, refer to the following sections:

Other turf species are occasionally grown in California. View a list of common problems found on the following:


Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2016 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 our Home page, or in the U.S., contact your local Cooperative Extension office for assistance.

Agriculture and Natural Resources, University of California

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