Compiled by Brian Hudelson and Hulubanche Kassa

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from June 6, 2026 through June 12, 2026.

 

 

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Broad-Leafed Woody Ornamentals

Plant:  Birch (River)
Disease/Disorder:  Chlorosis
Pathogen:  None
County:  Dane

Plant:  Boxwood
Disease/Disorder:  Fusarium Canker
Pathogen:  Fusarium sp.
County:  Dane

Plant:  Boxwood
Disease/Disorder:  Macrophoma Leaf Spot/Blight
Pathogen:  Macrophoma sp.
County:  Walworth

Plant:  Boxwood
Disease/Disorder:  Volutella Canker
Pathogen:  Volutella sp.
Counties:  Dane, Walworth

Plant:  Maple (Japanese)
Disease/Disorder:  Phomopsis Canker
Pathogen:  Phomopsis sp.
County:  Milwaukee

Plant:  Maple (Silver)
Disease/Disorder:  Frost Crack
Pathogen:  None
County:  Chippewa

Plant:  Maple (Silver)
Disease/Disorder:  Girdling Roots
Pathogen:  None
County:  Chippewa

Plant:  Maple (Sugar)
Disease/Disorder:  Anthracnose
Pathogen:  Discula sp.
County:  Dane

Plant:  Maple (Unspecified)
Disease/Disorder:  Anthracnose
Pathogen:  Discula sp.
County:  Dane

Plant:  Maple (Unspecified)
Disease/Disorder:  Girdling Roots
Pathogen:  None
County:  Grant

Plant:  Maple (Unspecified)
Disease/Disorder:  Overly Deep Planting
Pathogen:  None
County:  Grant

Plant:  Oak (Pin)
Disease/Disorder:  Chlorosis
Pathogen:  None
County:  Milwaukee

Plant:  Oak (Unspecified)
Disease/Disorder:  Chlorosis
Pathogen:  None
County:  Sheboygan

Plant:  Pear (Callery)
Disease/Disorder:  Gymnosporangium Rust
Pathogen:  Gymnosporangium sp.
County:  Dane

Plant:  Redbud
Disease/Disorder:  Virus Disease
Pathogen:  Unspecified virus
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:  Tubercularia/Nectria Canker
Pathogen:  Tubercularia sp./Nectria sp.
County:  Dane

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Herbaceous Ornamentals

Plant:  Dianthus
Disease/Disorder:  Crown Gall
Pathogen:  Agrobacterium tumefaciens
County:  Ottawa (MI)

Plant:  Hosta
Disease/Disorder:  Anthracnose
Pathogen:  Colletotrichum sp.
County:  Iowa

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Houseplants

No New Diseases

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Needled Woody Ornamentals

Plant:  Arborvitae
Disease/Disorder:  Root/Crown Rot
Pathogen:  Phytophthora sp.
County:  Washington

Plant:  Pine (White)
Disease/Disorder:  Root/Crown Rot
Pathogen:  Phytophthora sp.
Counties:  Door, Kenosha

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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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