Lungworts are easy-to-grow landscape plants that prefer partial sun or shade and have moderate water needs. Not many diseases impact Lungwort plants, but their preference for shady areas and damp conditions make them susceptible to fungus. Seeing the spotted foliage become infected is disappointing, but fortunately, it is treatable.
Lungwort Powdery Mildew
Powdery mildew is a fungus caused by different types of Erysiphales fungi. Like most mildew, powdery mildew often occurs in damp, cramped accommodations. Plants like Lungwort that grow in the shade are more likely to become infected with powdery mildew because the fungus thrives in low-light areas. Increased humidity also encourages the growth and spread of powdery mildew.
If left unchecked, powdery mildew will spread to other leaves and nearby plants. The infected leaves will eventually wither and die.
Identifying Powdery Mildew
Powdery mildew appears as grayish-white splotches on foliage. It grows on the leaves' surface and has a slightly fuzzy texture.
Treating Powdery Mildew
Treat powdery mildew by removing infected foliage and spraying the plant with a fungicide. Thin the plants to increase airflow around the foliage. Improved air circulation eliminates excessive dampness, which is a leading factor of powdery mildew.
Lungwort Disease Chart
Powdery Mildew on Lungwort
White spots on leaves
Proper air circulation
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Author Alison Cotsonas - Published 05-10-2023