Asteromella forsythiae sp. nov., a new fungus on Forsythia sp.
Asteromella forsythiae sp. nov., ein neuer Pilz an Forsythia sp.
Journal für Kulturpflanzen, 70 (3). S. 108–109, 2018, ISSN 1867-0911, DOI: 10.1399/JfK.2018.03.03, Verlag Eugen Ulmer KG, Stuttgart
Asteromella forsythiae sp. nov. is a new pathogenic fungus collected on Forsythia sp.. Symptoms on host and fungus are described.
Key words: Asteromella forsythiae sp. nov., Forsythia sp., symptoms
Asteromella forsythiae sp. nov., ist ein neuer phytopathogener Pilz an Forsythia sp. Symptome an Wirtspflanze und sowie der Pilz werden beschrieben.
Stichwörter: Asteromella forsythiae sp. nov., Forsythia sp., Symptome
Within a project about biodiversity in allotment gardens of Vienna a new species of the genus Asteromella was found on Forsythia sp. in an allotment in the western part of Vienna near the so called Wienerwald in October 2016, which caused brown leaf spots on its host.
Up to now no species of the genus Asteromella is known on Forsythia sp.
For the determination of the fungus the usual mycological routine methods of light microscopy were adopted. Conidia of the fungus were stained with Wittmann’s Blue (Wittmann, 1970). They have been measured using the programme labSens by Olympus.
Asteromella forsythiae Bedlan sp. nov.
Index Fungorum IF554288
Pycnidia on both sides of the leaves, scattered on brown leaf-spots, black, semi-immersed, with a diameter of 44.36 × 91.44 μm (with an average of 63.82 μm) were detected (Fig. 1 and 2). The conidia are hyaline, cylindrical, rounded at the ends, bacilliform and are 2.71–4.43 × 0.45–1.01 μm (average of 3.53 × 0.66 μm) in diameter (Fig. 3). The fungus was detected on living leaves of Forsythia sp.
Fig. 1. Symptoms on leaves
Fig. 2. Pyknidia on the upper side of a leaf
Fig. 3. Conidia, stained with Wittmann’s Blue (Wittmann, 1970)
Type: Austria, Vienna. On living leaves of Forsythia sp., 12 October 2016, Vienna (Kleingartenverein Hietzing und Umgebung, Gruppe Halterbachtal, Wolfersberggasse 45, 1140 Wien; N 48.209872, O 16.254887) leg. et det. G. Bedlan (holotype, hb W).
The type specimen has been deposited at the department of Botany, Natural History Museum, Vienna (hb W).
Etymology: The new species found on Forsythia sp. is named according to the host where it has been found.
Wittmann, W., 1970: Ein neues Rezept zur Herstellung mykologischer Präparate. Pflanzenschutzberichte 41 (5/6/7), 91-94.
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