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How to Manage Pests

Pests in Gardens and Landscapes

More flowers

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.

Invertebrates

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

Invertebrates (cont.)

Diseases

Environmental disorders

Weeds

Vertebrates

Statewide IPM Program, Agriculture and Natural Resources, University of California
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