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Month: Jan
Year: 2010
State: OR
County: Marion
Grower: Home Garden
Host Category: woody ornamentals
Host Common Name: choke cherry
Host Scientific Name: Prunus virginiana
Symptoms: black knot stem galls
Parts affected: stem
Primary Pathogen Category: fungus
Diagnosis Common Name: black knot
Diagnosis Scientific Name: Apiosporina morbosa
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