Peronospora alyssi-calycini Gäumann, 1918

on Alyssum

gall

upperside of the leaves with paled, slightly thickened patches. Shoots in bud grow vertically upwards and do not come into flower. Underside of the leaves with a white fungal bloom, consisting of erect, distally strongly branched conidiophores, each one ending upon an egg-shaped conidium.

hostplants

Brassicaceae, monofaag

Alyssum alyssoides, montanum.

A reference by Mayor (1967a) to Alyssum maritimum [= Lobularia maritima] probably concerns Hyaloperonospora lobulariae.

references

Brandenburger (1985a), Buhr (1964b), Doppelbaur, Huber & Poelt (1965a), Gustavsson (1991a), Klenke & Scholler (2015a), Mayor (1967a), Săvulescu (1948a).