Compiled by Brian Hudelson and Hulubanche Kassa

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from October 3, 2026 through October 9, 2026.

 

 

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Broad-Leafed Woody Ornamentals

Plant:  Hydrangea
Disease/Disorder:  Root/Crown Rot
Pathogens:  Phytophthora sp., Rhizoctonia sp.
County:  Crawford

Plant:  Magnolia
Disease/Disorder:  Verticillium Wilt
Pathogen:  Verticillium sp.
County:  Dane

Plant:  Oak (Unspecified)
Disease/Disorder:  Chlorosis
Pathogen:  None
County:  Dane

Plant:  Oak (Unspecified)
Disease/Disorder:  Oak Wilt
Pathogen:  Bretziella fagacearum
County:  Dane

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Field Crops

Plant:  Corn
Disease/Disorder:  Gibberella Stalk Rot
Pathogen:  Fusarium graminearum
County:  Rock

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Forage Crops

No New Diseases

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Fruit Crops

Plant:  Apple
Disease/Disorder:  Chlorosis
Pathogen:  None
County:  Milwaukee

Plant:  Apple
Disease/Disorder:  Fertility Issues (Suspected)
Pathogen:  None
County:  Milwaukee

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Herbaceous Ornamentals

Plant:  Hosta
Disease/Disorder:  Anthracnose
Pathogen: Colletotrichum sp.
County:  Waukesha

Plant:  Hosta
Disease/Disorder:  Heat Stress (Suspected)
Pathogen: None
County:  Waukesha

Plant:  Pachysandra
Disease/Disorder:  Volutella Blight
Pathogen:  Volutella pachysandricola
County:  Waukesha

Plant:  Sedum
Disease/Disorder:  Anthracnose
Pathogen: Colletotrichum sp.
County:  Waukesha

Plant:  Sedum
Disease/Disorder:  Cercospora Leaf Spot
Pathogen:  Cercospora sp.
County:  Waukesha

Plant:  Sedum
Disease/Disorder:  Powdery Mildew
Pathogen:  Oidium sp.
County:  Waukesha

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Houseplants

No New Diseases

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Needled Woody Ornamentals

Plant:  Arborvitae
Disease/Disorder:  Phyllosticta Needle Blight
Pathogen: Phyllosticta sp.
County:  Dane

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Vegetable Crops

No New Diseases

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Specialty Crops

No New Diseases

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Miscellaneous

No New Entries

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