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How to Manage Pests

Pests in Gardens and Landscapes

Common abiotic disorders of Chrysanthemum

Damage symptoms on Chrysanthemum can be caused by nonliving or abiotic factors including excess or deficient water, nitrogen or other mineral deficiencies, or temperatures that are too hot or too cold. For example:

  • Inadequate water causes plants to wilt and drop leaves. Excess water causes root rot and death of plants.
  • Nitrogen deficiency causes leaves to yellow uniformly, beginning with the older foliage; other mineral deficiencies cause mottling or discoloration of leaves.
  • Damage caused by herbicides, salts, or other mineral toxicities, may cause plants to become distorted or stunted, or leaves to brown or yellow at the margins.

Solutions

Prevent abiotic disorders by properly following irrigation and fertilizer recommendations and making sure that herbicides don't drift over into your planting beds.

Leaf necrosis caused by excess salt
Leaf necrosis caused by excess salt

Foliage damage due to nitrogen deficiency
Foliage damage due to nitrogen deficiency

Foliage wilt due to drought
Foliage wilt due to drought


Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2008 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/FLOWERS/ENVIRON/commonchrysan.html revised: January 17, 2008. Contact webmaster.