The UK's first instance of the disease on hellebore has caused leaves to go pale and distorted.
Leaves eventually become necrotic. The damage can destroy the plant.
ADAS recommend not using overhead irrigation in the evening and using circulation fans to improve air movement.
A protectant spray programme would be based around Amistar, Fenomenal, Paraat, Revus and Proplant.
Fubol Gold provides control when the disease is active.