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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