Cercospora depazeoides

Leaf spots on elder

Description

Cercospora depazeoides is a fungal pathogen that affects elder plants (Sambucus spp.). It causes leaf spots and lesions, leading to premature leaf drop and reduced photosynthesis. The disease is characterized by small, dark, irregularly shaped spots on the leaves, which can merge and cause significant defoliation. This can weaken the plant, impacting its growth and fruit production. Proper management includes removing infected leaves and ensuring good air circulation to reduce humidity around the plants.

Symptom

Leaf spots are small, round to irregularly shaped and appear on the leaves. These spots are typically dark brown or grayish with a much darker border. They can vary in size but often measure 2-4 mm in diameter. The spots can expand and merge, leading to larger, necrotic areas on the leaves. These lesions are usually irregular in shape and can cover significant portions of the leaf surface.

Tree Species: Elderberry

Part of a plant- attacked: Leaf / Needle

Pest significance: Harmful

Pest Category: Fungi

Invasive Species: No

Present in EU: Yes