Willowherb Rust - Puccinia pulverulenta

Description

Willowherb rust is a disease caused by the fungus, Puccinia pulverulenta. Initially, pale, ill defined yellow spots appear on the upper leaf surface, corresponding to orange, dusty pustules on the lower surface.

Identification difficulty
Habitat

Where willowherbs are plentiful.

When to see it

Summer

Life History

The fungus releases orange spores from the pustules and these are spread by the wind to initiate new infections on leaves.

UK Status

Widespread and fairly frequent in Britain.

VC55 Status

Thought to be fairly frequent in Leicestershire and Rutland.

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Leicestershire & Rutland Map

MAP KEY:

Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map