Managing Pests in Gardens: Floriculture: Chrysanthemum

Pests in Gardens and Landscapes

Chrysanthemum, Mum—Chrysanthemum morifolium, Dendranthema grandiflora
Family Asteraceae (Sunflower family)

Plant Identification

Chrysanthemum morifolium and Dendranthema grandiflora are perennial plants often grown as annuals. They are usually found in borders or pots. Flowers bloom in late summer or fall and vary in form, size, and color. Colors include red, pink, orange, yellow, purple, and white.

Optimum conditions for growth

Chrysanthemums need regular water and fertilizer during the growing period. Plant in rich soil with good drainage. They can do well in areas with full sun, but in hot climates should be protected from afternoon sun. Pinch tips back in early spring for more compact plants.

Yellow chrysanthemum blossom

Pests and disorders of *Chrysanthemum morifolium* and *Dendranthema grandiflora*
Invertebrates Aphids Chrysanthemum aphid Green peach aphid Leaf curl plum aphid Melon aphid Pea aphid Potato aphid Broad mite Cyclamen mite Foliage-feeding caterpillars Beet armyworm Cabbage looper Corn earworm Greenhouse leaftier Omnivorous leaftier Tobacco budworm Variegated cutworm Gall midges Chrysanthemum gall midge Leafhoppers Leafminers Chrysanthemum leafminer Pea leafminer Serpentine leafminer Mealybugs Root knot nematode Soft scales Black scale Hemispherical scale Spider mites Twospotted spider mite Thrips Banded greenhouse thrips Chrysanthemum thrips Greenhouse thrips Western flower thrips	Invertebrates (cont.) True bugs Plant bugs, Lygus spp. Weevils Black vine weevil Fuller rose beetle Whiteflies Silverleaf whitefly Sweetpotato whitefly Diseases Aster yellows Bacterial blight, hollow stem Botrytis blight (gray mold) Crown gall Fasciation Fusarium wilt Leaf spots Septoria leaf spot Powdery mildew Root and stem rot Verticillium wilt Viruses Aspermy, tomato aspermy virus Chrysanthemum chlorotic mottle viroid Chrysanthemum mosaic virus Chrysanthemum stunt viroid Impatiens necrotic spot virus Tomato spotted wilt virus Environmental disorders Common abiotic disorders of Chrysanthemum Weeds Vertebrates

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How to Manage Pests

Pests in Gardens and Landscapes

Chrysanthemum, Mum—Chrysanthemum morifolium, Dendranthema grandiflora Family Asteraceae (Sunflower family)

Plant Identification

Optimum conditions for growth

Invertebrates

Invertebrates (cont.)

Diseases

Environmental disorders

Weeds

Vertebrates

Chrysanthemum, Mum—Chrysanthemum morifolium, Dendranthema grandiflora
Family Asteraceae (Sunflower family)