Podosphaera phtheirospermi (Hennings & Shirai) Braun & Liu, 2010

on Orobanchaceae, Scrophulariaceae

Odontites vernus, Belgium, prov. Limbourg, Dilsen-Stokkem, Oude Maas, 16.vii.2019 © Carina Van Steenwinkel

The infection co-occurred with Coleosporium euphrasiae (orange spot).

conidiophore

conidia

young cleistothecia

gall

mycelium amphigenous, often also on stems, white or brown. Appressoria indistinct to nipple-shaped. Conidia formed in chains, with fibrosin bodies, short-elliptic. Cleistothecia with a single ascus, containing usually eight spores. Appendages up to 10, 0.3-3 x the diameter, mycelioid, brown, flaccid, septate, mostly unbranched.

host plants

Orobanchaceae, Scrophulariaceae, narrowly polyphagous

Bartsia alpina; Euphrasia frigida, hirtella, kerneri, liburnica, micrantha, minima, nemorosa, pectinata, rostkoviana, salisburgensis, stricta; Lagotis minor, uralensis; Melampyrum arvense, bihariense, caucasicum, chlorostachyum, cristatum, nemorosum, polonicum, pratense, saxosum, sylvaticum; Odontites lanceolatus, litoralis, luteus, vernus, vulgaris; Pedicularis amoena, caucasica, comosa, flammea, foliosa, hacquetii, labradorica, lapponica, oederi, palustris, resupinata, sceptrum-carolinum, sudetica, sylvatica, verticillata; Rhinanthus alectorolophus, angustifolius, glacialis, minor, ovifugus, rumelicus; Scrophularia canina & subsp. bicolor + crithmifolia + hoppii, cretacea, heterophylla subsp. laciniata, nodosa.

The reference to Misopates orontium and Penstemon barbatus (Plantaginaceae) by Klenke & Scholler needs conformation.

references

Braun (1995a), Braun & Cook (2012a), Bresinsky (2016a), Jage, Klenke, Kruse ao (2016a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Leysen (2013a, 2017a), Scholler, Reinhard & Schubert (1996a) [Sphaerotheca fusca on Melampyrum pratense]).