How to Manage Pests

Pests in Gardens and Landscapes

Dahlia—Dahlia spp.
Family Asteraceae (Sunflower family)

Plant Identification
Dahlias are perennial plants that are grown around shrubs, in borders, or in pots.  Dahlias produce clusters of flowers in many different forms and colors.  They bloom from early summer into winter.  Dahlias have strong stems with divided leaves.

Optimum conditions for growth

Dahlias do well in full sun but require light shade in the hottest areas.  They require regular watering and need well-drained soil.

Dahlia blossom
Blossom of Dahlia

Pests and disorders of Dahlia spp.


  • Aphids
    • Aster or Erigeron root aphid
    • Black bean aphid
    • Foxglove aphid
    • Green peach aphid
    • Melon aphid

Invertebrates (cont.)


Environmental disorders



Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2017 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

Accessibility   Contact webmaster.