Compiled by Brian Hudelson and Dante Tauscheck
The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from May 10, 2025 through May 16, 2025.
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Broad-Leafed Woody Ornamentals
Plant: Hickory
Disease/Disorder: Phomopsis Gall
Pathogen: Phomopsis sp.
County: Door
Plant: Oak (Unspecified)
Disease/Disorder: Armillaria Root Disease
Pathogen: Armillaria sp.
County: Walworth
Plant: Trees and shrubs (Miscellaneous)
Disease/Disorder: Herbicide Damage
Pathogen: None
County: Dane
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Field Crops
No New Diseases
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Forage Crops
No New Diseases
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Fruit Crops
Plant: Apple
Disease/Disorder: Phomopsis Canker
Pathogen: Phomopsis sp.
County: St. Croix
Plant: Apple
Disease/Disorder: Transplant Shock (Suspected)
Pathogen: None
County: St. Croix
Plant: Apple
Disease/Disorder: Winter Injury (Suspected)
Pathogen: None
County: St. Croix
Plant: Raspberry
Disease/Disorder: Root Rot
Pathogen: Phytophthora sp.
County: Milwaukee
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Herbaceous Ornamentals
Plant: Bergenia
Disease/Disorder: Transplant Shock (Suspected)
Pathogen: None
County: Waukesha
Plant: Bergenia
Disease/Disorder: Winter Injury (Suspected)
Pathogen: None
County: Waukesha
Plant: Herbaceous Ornamentals (Miscellaneous)
Disease/Disorder: Herbicide Damage
Pathogen: None
County: Dane
Plant: Monarda
Disease/Disorder: Gray Mold (Botrytis Blight)
Pathogen: Botrytis sp.
County: Green
Plant: Monarda
Disease/Disorder: Winter Injury (Suspected)
Pathogen: None
County: Green
Plant: Pachysandra
Disease/Disorder: Volutella Blight
Pathogen: Volutella pachysandricola
Counties: Milwaukee, Waukesha
Plant: Pachysandra
Disease/Disorder: Winter Injury (Suspected)
Pathogen: None
County: Milwaukee
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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
Plant: Arborvitae
Disease/Disorder: Root Rot
Pathogen: Phytophthora sp.
County: Dane
Plant: Arborvitae
Disease/Disorder: Transplant Shock (Suspected)
Pathogen: None
County: Grant
Plant: Arborvitae
Disease/Disorder: Water Stress (Suspected)
Pathogen: None
County: Dane
Plant: Arborvitae
Disease/Disorder: Winter Burn (Suspected)
Pathogen: None
County: Grant
Plant: Juniper
Disease/Disorder: Winter Burn (Suspected)
Pathogen: None
Counties: Milwaukee, Sheboygan
Plant: Pine (Japanese White)
Disease/Disorder: Cyclaneusma Needle Blight
Pathogen: Cyclaneusma minus
County: Dane
Plant: Pine (White)
Disease/Disorder: White Pine Blister Rust
Pathogen: Cronartium ribicola
County: Dane
Plant: Spruce (Black Hills)
Disease/Disorder: Rhizosphaera Needle Cast
Pathogen: Rhizosphaera kalkhoffii
County: Dodge
Plant: Spruce (Blue)
Disease/Disorder: Rhizosphaera Needle Cast (Suspected)
Pathogen: Rhizosphaera kalkhoffii
County: Dunn
Plant: Spruce (White)
Disease/Disorder: Fertility Issues (Suspected)
Pathogen: None
County: Dane
Plant: Spruce (White)
Disease/Disorder: Winter Burn (Suspected)
Pathogen: None
County: Dane
Plant: Trees and shrubs (Miscellaneous)
Disease/Disorder: Herbicide Damage
Pathogen: None
County: Dane
Plant: Yew
Disease/Disorder: Twig Blight
Pathogen: Sphaeropsis 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 Reports
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