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Aecidium clematidis

Rust Aecidium clematidis

Description

Aecidium clematidis is a rust fungus that parasitizes Clematis species, especially Clematis vitalba, C. cirrhosa and C. recta. It is a monophagous pathogen from the family Ranunculaceae, mostly occurring in southern and central Europe. The fungus forms bright yellow aecia on the undersides of infected leaves, sometimes also on stems. These fruiting bodies appear in yellowish or chlorotic spots, often slightly swollen and gall-like. The infection may cause aesthetic damage by distorting leaves and creating conspicuous yellow lesions. The fungus spreads via wind-dispersed spores and usually completes its life cycle on Clematis without the need for an alternate host.

Symptom

Yellowish, swollen spots with bright yellow aecia on the underside of Clematis leaves and sometimes stems.

Tree Species: Clematis

Part of a plant- attacked: Leaf / Needle

Pest significance: Less harmful

Pest Category: Fungi

Invasive Species: No

Present in EU: Yes

Last observations

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

Aecidium clematidisRust Aecidium clematidis
Anonymous contributor
Number of votes: 0
Published: 20.5.2022