OSU Logo

Month: Feb
Year: 2014
State: OR
County: Washington
Grower: Greenhouse
Host Category: herbaceous ornamentals
Host Common Name: Iceland poppy
Host Scientific Name: Papaver nudicaule
Symptoms: leaf spots
Parts affected: leaf
Primary Pathogen Category: fungus
Diagnosis Common Name: downy mildew
Diagnosis Scientific Name: Peronospora arborescens
Popular Search Terms: downy mildew