Vitis vinifera, Belgium, prov. Antwerp, Mol © Carina Van Steenwinkel

cleistothecium

appendages

detail

ascus

Vitis vinifera, Nieuwendam

gall

mycelium amphigenous, also on the fruits, mostly dispersed, almost persistent. Appressoria lobed or multilobed, single or paired. Conidia solitary, elliptic, without fibrosin bodies. Foot cell of conidiophore twisted once or twice. Cleistothecia with 4-8 asci, containing 4-6 spores. Appendages 10-30, equatorial, 1-6 x the diameter; they are stiff, brown over at least the basal part, with 4-9 septa; apex not enlarged, loosely or tightly circinate.

host plants

Vitaceae, oligophagous

Cissus alata, antarctica; Parthenocissus inserta, quinquefolia, tricuspidata; Vitis amuresis, vinifera.

synonyms

Uncinula necator (Schweinitz) Burrill, 1892; Oidium tuckeri Berkeley, 1847.

notes

In Europe the var. necator.

hyperparasites

Ampelomyces quisqualis.

references

Angeli, Pellegrini & Pertot (2009a), Beenken & Senn-Irlet (2016a), Braun (1995a), Braun & Cook (2012a), Braun, Cunnington, Brielmaier-Liebetanz, Ale-Agha & Heluta (2003a), Bresinsky (2016a), Hajjeh, Miazzi & Faretra (2008a), Jage, Klenke & Kummer (2010a), Jage, Kruse, Kummer ao (2013a), Klenke & Scholler (2015a), Kruse (2019a), Kruse & Jage (2014a), Leysen (2017a), Mieslerová, Sedlářová, Michutová, ao (2020b), Mułenko, Piątek, Wołczańska ao (2010a), Negrean & Anastasiu (2006a), Ruszkiewicz-Michalska & Michalski (2005a), Unamuno (1943a).