Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from May 17, 2025 through May 23, 2025.

 

 

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Broad-Leafed Woody Ornamentals

Plant:  Boxwood
Disease/Disorder:  Volutella Canker
Pathogen:  Volutella sp.
County:  Waukesha

Plant:  Crabapple
Disease/Disorder:  Lichens
Pathogen:  None
County:  Florence

Plant:  Crabapple
Disease/Disorder:  Phomopsis Canker
Pathogen:  Phomopsis sp.
County:  Dane

Plant:  Crabapple
Disease/Disorder:  Sapsucker Damage
Pathogen:  None
County:  Florence

Plant:  Crabapple
Disease/Disorder:  Sphaeropsis Canker
Pathogen:  Sphaeropsis sp.
County:  Dane

Plant:  Lilac
Disease/Disorder:  Ascochyta Leaf Blight
Pathogen:  Ascochyta sp.
County:  Walworth

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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:  Sooty Mold
Pathogen:  Miscellaneous sooty mold fungi
County:  Iowa

Plant:  Plum
Disease/Disorder: Black Knot
Pathogen:  Apiosporina morbosa
County:  Jefferson

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Herbaceous Ornamentals

Plant:  Pachysandra
Disease/Disorder:  Volutella Blight
Pathogen:  Volutella pachysandricola
Counties:  Columbia, 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:  Waukesha

Plant:  Fir (White)
Disease/Disorder:  Phomopsis Canker
Pathogen:  Phomopsis sp.
County:  Dane

Plant:  Juniper
Disease/Disorder: Phomopsis Tip Blight
Pathogen:  Phomopsis juniperovora
County:  Milwaukee

Plant:  Juniper
Disease/Disorder: Winter Burn (Suspected)
Pathogen:  None
County:  Waukesha

Plant:  Spruce (Norway)
Disease/Disorder: Winter Burn (Suspected)
Pathogen:  None
Counties:  Milwaukee, Washington

Plant:  Spruce (Unspecified)
Disease/Disorder:  Rhizosphaera Needle Cast
Pathogen:  Rhizosphaera kalkhoffii
County:  Dane

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Vegetable Crops

Plant:  Cabbage
Disease/Disorder:  Damping-Off
Pathogen:  Pythium sp.
County:  Waushara

Plant:  Cantaloupe
Disease/Disorder:  Damping-Off
Pathogen:  Pythium sp.
County:  Monroe

Plant:  Pea
Disease/Disorder:  Root Rot
Pathogen:  Pythium sp.
County:  Waushara

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Specialty Crops

No New Diseases

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Miscellaneous

No New Reports

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