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Month: Sep
Year: 2010
State: OR
County: Clackamas
Grower: Farm
Host Category: fruit/nut trees
Host Common Name: walnut
Host Scientific Name: Juglans regia
Symptoms: pale leaf spots near veins
Parts affected: leaf
Primary Pathogen Category: fungus
Diagnosis Common Name: walnut downy leaf spot
Diagnosis Scientific Name: Microstroma juglandis
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