Chrysanthemum & Pest Control

Chrysanthemums are common garden flowers.

Chrysanthemums grow in a variety of conditions, and are commonly used in container gardens and for border planting. With proper gardening practices, they are relatively easy to grow. However, chrysanthemums are susceptible to a variety of insects and diseases.

Insect Pests

Chrysanthemum pests include insects and diseases. The most common insect pests are aphids, but chrysanthemums can also be affected by two-spotted spider mites, chrysanthemum leafminers, caterpillars, mealybugs, scales, thrips, weevils and whiteflies, according to the Clemson University Cooperative Extension Service.

Diseases

Diseases may affect plant leaves, flowers or root systems. Common chrysanthemum diseases include leaf spot, rust, powdery mildew, gray mold, foliar nematodes, blight, root rot and verticillium or fusarium wilt. Common viruses include mosaic virus, chlorotic mottle viroid, and stunt viroid, according to the University of Massachusetts Extension.

Treatment and Control

Control insects and diseases with proper gardening practices. Chrysanthemums require full sun and well-drained soil, and need regular watering. Fertilize plants during the growing period and pay special attention to watering needs. If you observe signs of insects or disease, take a sample of the affected area in to your local university extension for testing in order to ensure appropriate treatment. Most chrysanthemum pests are easily controlled with pesticide sprays or dusts, with the exception of verticillium wilt, according to the Ohio State University Extension.

References

• Clemson University Cooperative Extension Service: Chrysanthemum Diseases & Insect Pests
• University of Massachusetts Extension: Chrysanthemum Diseases
• University of California Integrated Pest Management: Chrysanthemum
• Ohio State University Extension: Growing Chrysanthemums