Compiled by Brian Hudelson and Dante Tauscheck
The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from November 1, 2025 through November 7, 2025.
Page Table of Contents
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Broad-Leafed Woody Ornamentals
Plant: Maple (‘Freeman’)
Disease/Disorder: Phytophthora Canker
Pathogen: Phytophthora sp.
County: Milwaukee
Plant: Oak (Bur)
Disease/Disorder: Tubakia Leaf Spot
Pathogen: Tubakia dryina
County: Dane
Plant: Oak (Red)
Disease/Disorder: Oak Wilt
Pathogen: Bretziella fagacearum
County: Dane
Plant: Oak (White)
Disease/Disorder: Anthracnose
Pathogen: Discula sp.
County: Dane
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Field Crops
Plant: Corn
Disease/Disorder: Gibberella Stalk Rot
Pathogen: Fusarium graminearum
County: Dane
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Forage Crops
No New Diseases
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Fruit Crops
No New Diseases
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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: Fir (White)
Disease/Disorder: Phyllosticta Needle Blight
Pathogens: Phyllosticta sp.
County: Dane
Plant: Spruce (Norway)
Disease/Disorder: Root Rot
Pathogens: Phytophthora sp.
County: Waukesha
Plant: Spruce (Unspecified)
Disease/Disorder: Rhizosphaera Needle Cast
Pathogens: Rhizosphaera kalkhoffii
County: Waukesha
Plant: Spruce (Unspecified)
Disease/Disorder: Spruce Needle Drop (Suspected)
Pathogens: Setomelanomma holmii
County: Waukesha
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Vegetable Crops
Plant: Carrot
Disease/Disorder: Aster Yellows (Suspected)
Pathogen: Aster yellow phytoplasma
County: Dodge
Plant: Potato
Disease/Disorder: Bacterial Soft Rot
Pathogen: Pectobacterium carotovorum subsp. carotovorum, Pectobacterium parmentieri
County: Waushara
Plant: Potato
Disease/Disorder: Common Scab
Pathogen: Streptomyces scabies
County: Dodge
Plant: Potato
Disease/Disorder: Pink Eye (Suspected)
Pathogen: None
County: Dodge
Plant: Tomato
Disease/Disorder: Edema
Pathogen: None
County: Walworth
Plant: Tomato
Disease/Disorder: Tobacco Mosaic
Pathogen: Tobacco mosaic virus
County: Walworth
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Specialty Crops
No New Diseases
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Miscellaneous
No New Entries
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