Campanula & Ants

Aphids

• Ants do not eat campanulas, but aphids do. Aphids are small, usually wingless insects that may be gray, brown, green, white or red. They attack many plants, including bellflowers, and pierce the stems and leaves, sucking the juices from the plant. In small numbers, the damage may not be noticeable. When numbers rise, though, the leaves may become distorted, wilted or dry. Aphids also produce honeydew, a sticky substance that ants feed on. In some cases, ants may even protect aphids from other insects or herd them to provide a continual food source.

Control

• Get rid of the aphids and you'll likely get rid of the ants. Many beneficial insects, such as ladybugs and lacewings feed on the aphids and may control them for you. Otherwise, spray the campanulas with a steady stream of water to dislodge the aphids. Try insecticidal soap or horticultural oil if the water doesn't work. Coat both the tops and bottoms of the leaves, covering the aphids thoroughly. Reapply treatments in seven to 10 days, if necessary.

Growing Conditions

• Healthy campanulas are better able to survive insect infestations and disease problems. Fend off aphids and ants by providing proper growing conditions. The plants' needs vary, depending on the cultivar, but most campanulas prefer moist, well-drained soil and partial to full sun.

Considerations

• Aphids and ants often appear early in the year when tender, young shoots emerge. They tend to move on later in the season, but other insects may appear. Watch for spider mites, thrips and slugs throughout the season, as well as powdery mildew and rust diseases. Campanulas are prone to root rot in soggy soils.