Podosphaera myrtillina var. myrtillina (Schubert) Kunze, 1823

on Vaccinium

Podosphaera myrtillina var. myrtillina on Vaccinium myrtillus

Vaccinium myrtillus, Belgium, prov. Flemish Brabant, Averbode, Bos en Heide © Carina Van Steenwinkel: the mycelium has already disappeared

Podosphaera myrtillina var. myrtillina

two cleistothecia …

Podosphaera myrtillina var. myrtillina

… containing a single ascus …

Podosphaera myrtillina var. myrtillina

… with eight spores

Podosphaera myrtillina var. myrtillina

appendage

gall

mycelium amphigenous, thin, evanescent. Appressoria poorly developed to nipple-shaped. Conidia short-oval, formed in chains, with fibrosin bodies. Cleistothecia 70-90 µm, with a single ascus, containing 8 spores. Appendages 5-8, ± equatorial, 1.5-6 x the diameter; they are rather stiff, almost straight, largely brown, 2-8 septate; at the very tip they are several times dichotomously branching in quick succession.

hostplants

Ericaceae, monophagous

Vaccinium x intermedium, myrtillus, oxycoccos, uliginosum, vitis-idaea.

references

Braun (1995a), Braun & Cook (2012a), Jage, Klenke, Kruse ao (2016a), Jage, Klenke & Kummer (2010a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Scholler, Reinhard & Schubert (1996a).

mod 26.viii.2018