Podosphaera spiraeae (Sawada) Braun & Takamatsu, 2000

on Spiraea

gall

mycelium amphigenous, also on stems, white, persistent; infected stems often distorted. Appressoria indistinct to ± nipple-shaped. Conidia oval, formed in chains, with fibrosin bodies. Cleistothecia, often in groups, with a single ascus, containing 6-8 spores. Appendages numerous, ± equatorial, 1-4 x the diameter; they are ± stiff, curved, septate, simple, dark brown when mature.

hostplants

Rosaceae, monophagous

Aruncus dioicus; Spiraea bella, betulifolia, x bumalda, cantoniensis, chamaedryfolia, japonia, media, salicifolia, thunbergii, x vanhouttei.

synonyms

Sphaerotheca spiraeae Sawada, 1951; S. macularis sensu Buhr (1964b), Blumer (1967a), Redfern & Shirley (2011a).

references

Beenken & Senn-Irlet (2016a), Blumer (1967a), Braun (1995a), Braun & Cook (2012a), Bresinsky (2016a), Buhr (1964b), Ellis & Ellis (1997a), Jage, Klenke & Kummer (2010a), Jage, Kruse, Kummer ao (2013a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (2015a), Mułenko, Piątek, Wołczańska ao (2010a), Mułenko, Sałata & Wołczańska (1995a), Piątek (2004a), Redfern Shirley (2011a), Roskam (2009a), Ruszkiewicz-Michalska (2006a), Talgø, Sundheim, Gjærum ao (2010a), Wołczańska & Mułenko (2002a).

mod 26.viii.2018