Sawadaea bicornis (Wallroth) Homma, 1937

on Acer

Sawadaea bicornis: conidia chains

Acer campestre, Nieuwendam: spring aspect, with conidia chains

Sawadaea bicornis: forming green islands in Acer campestre

Acer campestre, Nieuwendam, autumn: the mildew patches are situated at the underside of the green islands.

Sawadaea bicornis: macroconidia

Acer campestre, Nieuwendam: macroconidia

Sawadaea bicornis: cleistothecium

cleistothecium

Sawadaea bicornis: appendages

appendages

Sawadaea bicornis: immaturee ascus

immature ascus

Sawadaea bicornis: conidophore

conidiophore

Sawadaea bicornis: cleistothecium

Acer pseudoplatanus, Belgium, prov. Antwerp, Meerhout © Carina Van Steenwinkel

Sawadaea bicornis: cleistothecium and asci

released asci

Sawadaea bicornis: appendages

appenages

Sawadaea bicornis: ascus

ascus

Sawadaea bicornis on Acer platanoides

Acer platanoides, Castricum

Sawadaea bicornis: cleistothecium

cleistothecium

Sawadaea bicornis: cleistothecium

stronger magnification

gall

Mycelium mostly hypophyllous, rather thin. Conidia formed in chains, variable in size (micro- and macro-conidia), with fibrosin bodies. Cleistothecia hypophyllous, with 35-100 short, stiff appendages, most of them forked once of twice, the tips with a small hook.

hostplants

Sapindaceae, monophagous

Acer campestre, circinatum, heldreichii, macrophyllum, monspessulanum, negundo, opalus & subsp. obtusatum, pensylvanicum, platanoides, pseudoplatanus, rubrum, saccharum, saccharinum, tataricum & subsp. ginnala + semenovii.

Very common on Acer campestre. Occasionally on Aesculus hippocastanum.

synonyms

Uncinula aceris (de Candolle) Saccardo, 1882; U. bicornis (Wallrorth) Léveillé, 1851; Oidium aceris Rabenhorst, 1854.

references

Abras, Fassotte, Chandelier & Cavelier (2008a), Ale-Agha, Boyle, Braun ao (2008a), Blumer (1946a), Braun (1995a), Braun & Cook (2012a), Bresinsky (2016a), Czerniawska (2001a), Czerniawska, Madej, Adamska ao (2000a), Dynowska, Fiedorowicz & Kubiak (1999a), Ellis & Ellis (1997a), Jage, Klenke, Kruse ao (2016a), Jage, Kruse, Kummer ao (2013a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (2015a), Korytnianska & Popova (2012a), Kruse (2014a), Kruse & Jage (2014a), Scheuer & Bechter (2012a), Sucharzewska, Dynowska, Kubiak ao (2012b), Talgø, Sundheim, Gjærum ao (2010a), Tóth (1994a), Unamuno (1943a).

25/05/2017

pub 25.v.2017 · mod 13.viii.2017