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Month: Oct
Year: 2014
State: OR
County: Linn
Grower: Farm
Host Category: fruit/nut trees
Host Common Name: filbert
Host Scientific Name: Corylus avellana
Symptoms: orange and black dots on underside of leaves
Parts affected: leaf
Primary Pathogen Category: fungus
Diagnosis Common Name: powdery mildew
Diagnosis Scientific Name: Phyllactinia guttata
Popular Search Terms: powdery mildew