Camellia: Aphids

• Categories: Camellia Camellia Insects Ornamentals Shrubs
• Last review date: 2026-03-21 11:23

Biology

Camellias are infested by black citrus aphids and other aphids. The black citrus aphid is a small reddish-brown to black insect typically found on new growth and flower buds. These aphids may be found at any time of year, particularly on plants in protected sites.

Other aphid species may be brownish or green and are also often found on new growth. Aphid feeding typically causes distortion, twisting, or cupping of developing leaves.

Aphids often produce large amounts of honeydew, a sweet, sticky material which may become covered with a dark growth of sooty mold.

Management Options

See "Using Integrated Pest Management (IPM) in the Landscape" for successful problem management techniques.

Non-chemical Management

Select non-chemical management options as your first choice!

• Wash aphids from foliage with a strong stream of water.
• Hand-wipe to control minor infestations.
• High levels of nitrogen in the foliage encourage aphid reproduction. Switch to a slow-release or low-nitrogen fertilizer if necessary.
• Natural predators and parasites, including ladybird beetles, lacewings, and parasitic wasps, help control aphid populations.

Chemical Management

• Apply when aphids are first noticed.
• Test for sensitivity on camellias when using insecticidal soaps.
• Make sure spray application gets to underside of leaves.
• Use oils during delayed dormant season.

Approved Pesticides

If you choose to use a pesticide, some examples of products that are legal in Washington are listed below. Some products are labeled for just INDOOR or just OUTDOOR use, or may allow both uses. Be sure to choose a product appropriate for your situation. Always read and follow all label directions.

• All Seasons Horticultural and Dormant Spray Oil Concentrate [Organic]
  Active ingredient: mineral oil
  EPA registration number: 4-80
• Hi-Yield Dormant Spray
  Active ingredient: Paraffinc oil
  EPA registration number: 7401-428
• Ortho Max Malathion Insect Spray Concentrate
  Active ingredient: malathion
  EPA registration number: 239-739
• R-T-U Year-Round Spray Oil
  Active ingredient: mineral oil
  EPA registration number: 6218-78
• Safer Brand Insect Killing Soap Concentrate II [Organic]
  Active ingredient: potassium salts of fatty acid
  EPA registration number: 42697-60
• This list may not include all products registered for this use.