The author distinguishes three ecological groups of spring downy mildew species in the family Peronosporaceae: 1) those with systemic infection via persistent mycelium in vegetative organs, 2) those with systemic infection via fruits or seeds, and 3) those with dispersive infection initiated from oospores. Special attention is paid to Peronospora bulbocapni and its unusual sporulation in 1962.
Skalický V. (1964): Bemerkungen zur Biologie einiger Frühjahrspilze der Familie Peronosporaceae. – Česká Mykologie 18(2): 85–90.
