Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from November 8, 2025 through November 14, 2025.

 

 

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Broad-Leafed Woody Ornamentals

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

Plant:  Maple (Sugar)
Disease/Disorder:  Steganosporium Canker
Pathogen:  Steganosporium sp.
County:  Dane

Plant:  Oak (Bur)
Disease/Disorder:  Bur Oak Blight
Pathogen:  Tubakia iowensis
Counties:  Kenosha, Racine

Plant:  Oak (Bur)
Disease/Disorder:  Tubakia Leaf Spot
Pathogen:  Tubakia dryina
Counties:  Kenosha, Racine

Plant:  Spirea (Birchleaf)
Disease/Disorder:  Alternaria Leaf Spot
Pathogen:  Alternaria sp.
County:  Brown

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Field Crops

Plant:  Corn
Disease/Disorder:  Fusarium Stalk Rot
Pathogen:  Fusarium sp.
County:  Sauk

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Forage Crops

No New Diseases

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Fruit Crops

Plant:  Apple
Disease/Disorder:  Apple Scab
Pathogen:  Venturia inaequalis
County:  Clark

Plant:  Apple
Disease/Disorder:  Bitter Rot
Pathogen:  Colletotrichum sp.
County:  Clark

Plant:  Apple
Disease/Disorder:  Flyspeck
Pathogen:  Zygophiala jamaicensis
County:  Clark

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Herbaceous Ornamentals

No New Diseases

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Houseplants

No New Diseases

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Needled Woody Ornamentals

Plant:  Spruce (Unspecified)
Disease/Disorder:  Rhizosphaera Needle Cast
Pathogens:  Rhizosphaera kalkhoffii
Counties:  Dane, Sheboygan, Waukesha

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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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