Managing Powdery Mildew on Leucothoe

Managing Powdery Mildew on Leucothoe

A whitish, powdery coating on leucothoe leaves that progresses to yellowing and leaf drop is characteristic of powdery mildew, a common fungal disease in shady, humid locations. The fungus resembles baby powder on leaf surfaces and can significantly weaken the plant if left unchecked.

Fungicide Options

Effective fungicides include Spectracide Immunox, Fertilome Liquid Systemic Fungicide, and Ortho Funginex. Applications should begin early in spring as new leaves emerge and continue at labeled intervals. Always follow label instructions precisely.

Sanitation

Rake and destroy all fallen leaves before spring to eliminate overwintering spores. This cultural practice is critical for reducing disease pressure in subsequent seasons.