Taphrina padi (Jaczewski) Mix, 1947
pocket plum gall
on Prunus
Prunus padus, Amsterdam, IJburg, 5.v.2021 © Cor Zonneveld
a slightly later stage; the anthers start wilting and the receptacle already is swollen somewhat.
Dronten, Binnenbos, 21.iv.2020 © Arnold Grosscurt: initial galling: note swelling of the peduncle, receptacle and anthers
22.iv.2020: the ovary is enlarged, the anthers are flipped downwards
27.iv.2020: the anthers are grey, i.e. covered with asci
11.v.2020: anthers and receptacle are completely disintegrated
Prunus padus, Zwolle, Zandhove, 11.v.2021 © Arnold Grosscurt: less conspicuously, probably also less frequently, also leaves and young shoots are galled
galled petiole
Prunus padus, Belgium, prov. Antwerp, Geel, Neerheist, 21.v.2020 © Carina Van Steenwinkel
section through a swollen anther, lined with asci
the layer of asci
detail, to show the basal cells
another imago
an isolated ascus; the measurements were 10-12 x 30-48 µm.
released ascospores
ascospores
Prunus padus, Duin en Kruidberg, 26.v.2012
Prunus padus, Eerbeek, Coldenhove, 14.vi.2014 © Arnold Grosscurt: the galls sometimes seem infested by boring insects
section through a galled and a normal fruit; in the gall the remnant of the stone is still recognisable
Prunus padus, Biddinghuizen, Spijk- en Bremerbergbos 26.v.2016 © Hans Jonkman
galled young shoot, on a tree that also had galled fruits
all within a week the galled fruits wither an drop to the grond
some three days later
also the twig galls soon shrivel
host plants
Rosaceae, narrowly monophagous
Prunus padus.
notes
Redfern & Shirley (2011a) write that in galled fruits the styles are persistent, but this does not happen in all cases.
references
Bacigálová, Mułenko & Wołczańska (2005a), Bellmann (2012a), Buhr (1965a), Chinery (2011a), Dauphin & Aniotsbehere (1997a), Dietrich (2013a), Grosscurt (2020c), Jage, Kruse, Kummer ao (2013a), Klenke & Scholler (2015a), Koops (2013a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2019a), Mix (1936a, 1949a), Petrýdesová, Kučera, Bacigálová, ao (2016a), Redfern & Shirley (2011a), Roskam (2009a), Tomasi (2003a, 2014a).