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Erysiphe palczewskii

Erysiphe palczewskii

Description

The white epiphytical mycelium and conidia are present on both sides of leaves and young shoots where they form colonies of an irregular shape joining together in time and later covering the whole leaf. Apricot and black cleistothecia start to appear from the mid June. In case of severe infection, leaves die back and shoots are deformed. The fungus is an invasive species originating from Asia and since the mid 1990s it has been gradually found in Europe. In Europe established, but still rare.

Symptom

The white epiphytical mycelium and conidia are present on both sides of leaves and young shoots where they form colonies of an irregular shape joining together in time and later covering the whole leaf. 

Tree Species: Black Locust, Caragana

Part of a plant- attacked: Leaf / Needle

Pest significance: Less harmful

Pest Category: Fungi

Invasive Species: Yes

Present in EU: Yes

Last observations

There are a total of 2 observations of the species in the system

Erysiphe palczewskii Erysiphe palczewskii
andrej
Number of votes: 0
Published: 14.10.2025

Erysiphe palczewskii Erysiphe palczewskii
AK73
Number of votes: 0
Published: 19.7.2023

Erysiphe palczewskii Erysiphe palczewskii
AK73
Number of votes: 0
Published: 19.7.2023

Erysiphe palczewskii Erysiphe palczewskii
AK73
Number of votes: 0
Published: 19.7.2023

Erysiphe palczewskii Erysiphe palczewskii
AK73
Number of votes: 0
Published: 19.7.2023