Taphrina crataegi Sadebeck, 1890

on Crataegus

Taphrina crataegi on Crataegus nigra

Crataegus nigra, Hungary, Budapest, Hűvösvölgy, 20.iv.2018 © László Érsek

Taphrina crataegi on Crataegus nigra

another specimen

Taphrina crataegi on Crataegus nigra

same leaf, underside

18678

Crataegus monogyna, Millingerwaard

gall

in May-Jue the infected leaves are whitish at both sides because they are covered by a layer of asci; later the leaves wither off.

hostplants

Rosaceae, monophagous

Crataegus laevigata, monogyna, nigra, sanguinea.

references

Bellmann (2012a), Buhr (1964b), Klenke & Scholler (2015a), Redfern & Shirley (2011a), Tomasi (2014a).

mod 9.x.2018