Tracya lemnae (Setchell) Sydow & Sydow, 1901

on Spirodela

Spirodela polyrhiza, Belgium, prov. Antwerp, Veerle, de Roost, 5.ix.2021 © Carina Van Steenwinkel

infected disk

detail

section through a spore ball

surface of the spore ball

Spirodela polyrhiza, Belgium, prov. Antwerp, Retie, Witte Netevallei, 25.viii.2021 © Carina Van Steenwinkel: released spore balls

gall

on top of vague, pale spots lay, embedded in the tissue, light brown spore balls, up to ± 0.2 mm in size. A spore ball consists of a three-dimensional netwerk of stiff hyphae, lined at the outside with a single, continuous layer of spores.

host plants

Araceae, monophagous

Spirodela polyrhiza.

references

Klenke & Scholler (2015a), Płachecka (2005a), Spooner & Leon (2006a), Van Steenwinkel, Fraiture & Vanderweyen (2022a), Vánky (1981a, 1994a).