Laboratory culture of Peronoplasmopara humuli enabled detailed study of temperature effects on its lifecycle. The optimal range for zoospore release was 19–25 °C. Infection occurred between 1–29 °C, with 21–25 °C as optimal for a 3-day incubation period. Very low or high temperatures did not reduce the pathogen’s infective ability under optimal conditions.
Petrlík Z., Štys Z. (1966): Der Einfluss der Temperatur auf das Ausschwärmen der Zoosporen, Infektion und infektionszeit der Hopfenperonospora (Peronoplasmopara humuli Miy. et Tak.). – Česká Mykologie 20(2): 105–110.