Macrographs of the evolution of the acervuli under a walnut leaf: A - 10 June 2019: Formation of pustules. B - July 20, 2019 : Pustules emit sporiferous jelly. C - November 2019, the pustules have become black, flat acervuli, before the pustules are formed.
Jean Lecomte / Biosphoto
JPEG bitmap image
Image size: 2744x4724 pixels (9.1"x15.7" @300dpi)
Shooting date : 2019-11-10