Erysiphe azaleae

Azalea powdery mildew

Description

The fungus Erysiphe azaleae poses a significant threat to Azalea plants, causing damage and impairing their health. Erysiphe azaleae is a powdery mildew fungus that specifically targets Azalea species, leading to a range of detrimental effects. Infected Azalea plants exhibit characteristic signs of powdery mildew, with a white or grayish powdery growth appearing on the surface of leaves, stems, and flower buds. This fungal growth interferes with the plant\'s ability to photosynthesize properly, leading to reduced vigor and stunted growth. As the infection progresses, the leaves may become distorted, curl, and eventually wither and drop down prematurely. Is a native North American powdery mildew introduced to Europe in around year 2000.Erysiphe azaleae thrives in conditions of high humidity and moderate temperatures, making it particularly problematic in regions with a suitable climate for its development. Overcrowded planting, poor air circulation, and excessive moisture increase the risk of infection.

Symptom

Infected Azalea plants exhibit characteristic signs of powdery mildew, with a white or grayish powdery growth appearing on the surface of leaves, stems, and flower buds.

Tree Species: Azalea, Rhododendron

Part of a plant- attacked: Leaf / Needle

Pest significance: Harmful

Pest Category: Insects

Invasive Species: Yes

Present in EU: Yes