Peronospora insubrica Gäumann, 1923
upperside of the leaves with paled, slightly embossed patches; at the corresponding underside a greyish fungal bloom, consisting of erect, distally strongly branched conidiophores. The conidiophores are up to 0.6 mm high, de conidia measure 9-24 x 14-35 µm.
Rubiaceae, narrowly monofaag
Brandenburger (1985a), Buhr (1964b), Klenke & Scholler (2015a), Săvulescu (1948a).