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Gaillardia Diseases

Name: Gaillardia Diseases
SKU: ART-3292

Informational table showing disease name, symptoms, pathogen/cause, and management of Gaillardia diseases.

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Updated:

July 5, 2023

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Disease	Symptoms	Pathogens/Cause	Management
Aster yellows	Leaves are yellowed and flowers do not appear normal or of good quality.	Phytoplasma (bacterial-like organism)	Remove and destroy infected plants. Control leafhoppers early in the season with insecticides in order to suppress spread of the pathogen from weeks to your plants.
Bacterial leaf spot	Areas between veins turn dark brown and collapse. The entire plant may be killed	Pseudomonas	Remove and destroy infected plants. Do not use sprinkler irrigation.
White smut	At first light green spots, some with tan centers, form on the leaves and white spores form on the spots. The leaf spots become dark brown.	Entyloma spp.	Remove and destroy spotted leaves. Apply a fungicide to protect plants.
Septoria leaf spot	Tan spots containing tiny dark brown to black dot-like fungal fruiting structures form on the leaves.	Septoria	Do not use sprinkler irrigation.
Powdery mildew	White fungal growth develops on the surface of leaves.	Golovinomyces and Sphaerotheca	Apply a fungicide to protect plants.
Root and stem rots	Lower stems turn tan to dark brown. Sometimes white webs of fungal growth can be seen.	Pythium, Sclerotinia, Thielaviopsis, Rhizoctonia	Avoid overwatering and do not mound mulch against the plant.
Viruses	Leaves may be distorted or have patches of light and dark green coloration	Impatiens necrotic spot, tomato spotted wilt, or and cucumber mosaic virus	Remove and destroy infected plants. Control thrips (vector of impatiens necrotic spot and tomato spotted wilt) and aphids (vectors of cucumber mosaic).