Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from January 31, 2026 through February 6, 2026.

 

 

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Broad-Leafed Woody Ornamentals

Plant:  Boxwood
Disease/Disorder:  Anthracnose
Pathogen:  Colletotrichum sp.
County:  Dane

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

Plant:  Oak (Red)
Disease/Disorder:  White Rot
Pathogen:  Grifola frondosa
County:  Dane

Plant:  Oak (Red)
Disease/Disorder:  White Rot
Pathogen:  Laetiporus sp.
County:  Dane

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Field Crops

No New Diseases

(Back To Menu)

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Forage Crops

No New Diseases

(Back To Menu)

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Fruit Crops

No New Diseases

(Back To Menu)

---

Herbaceous Ornamentals

No New Diseases

(Back To Menu)

---

Houseplants

No New Diseases

(Back To Menu)

---

Needled Woody Ornamentals

No New Diseases

(Back To Menu)

---

Vegetable Crops

No New Diseases

(Back To Menu)

---

Specialty Crops

No New Diseases

(Back To Menu)

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Miscellaneous

No New Entries

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Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from January 24, 2026 through January 30, 2026.

 

 

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Broad-Leafed Woody Ornamentals

No New Diseases

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Field Crops

No New Diseases

(Back To Menu)

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Forage Crops

No New Diseases

(Back To Menu)

---

Fruit Crops

No New Diseases

(Back To Menu)

---

Herbaceous Ornamentals

No New Diseases

(Back To Menu)

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Houseplants

No New Diseases

(Back To Menu)

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Needled Woody Ornamentals

No New Diseases

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Vegetable Crops

Plant:  Carrot
Disease/Disorder:  Bacterial Soft Rot
Pathogen:  Unspecified bacterial soft rot bacteria
County:  Dane

Plant:  Carrot
Disease/Disorder:  Root Rot
Pathogen:  Pythium sp.
County:  Dane

Plant:  Potato
Disease/Disorder:  Black Dot
Pathogen:  Colletotrichum coccodes
County:  Columbia

Plant:  Potato
Disease/Disorder:  Silver Scurf
Pathogen:  Helminthosporium solani
County:  Columbia

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Specialty Crops

No New Diseases

(Back To Menu)

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Miscellaneous

No New Entries

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Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from January 17, 2026 through January 23, 2026.

 

 

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Broad-Leafed Woody Ornamentals

No New Diseases

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Field Crops

No New Diseases

(Back To Menu)

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Forage Crops

No New Diseases

(Back To Menu)

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Fruit Crops

No New Diseases

(Back To Menu)

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Herbaceous Ornamentals

Plant:  Bleeding Heart
Disease/Disorder:  Phytoplasma Disease
Pathogen:  Unspecified phytoplasma
County:  Ottawa (MI)

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Houseplants

Plant:  Hibiscus
Disease/Disorder:  Anthracnose
Pathogen:  Colletotrichum sp.
County:  Milwaukee

Plant:  Mandevilla
Disease/Disorder:  Anthracnose
Pathogen:  Colletotrichum sp./Glomerella sp.
County:  Milwaukee

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Needled Woody Ornamentals

No New Diseases

(Back To Menu)

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Vegetable Crops

No New Diseases

(Back To Menu)

---

Specialty Crops

No New Diseases

(Back To Menu)

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Miscellaneous

No New Entries

(Back To Menu)

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Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from January 10, 2026 through January 16, 2026.

 

 

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Broad-Leafed Woody Ornamentals

Plant:  Cottonwood
Disease/Disorder:  White Rot
Pathogen:  Cerioporus (Polyporus) squamosus
County:  Dane

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Field Crops

No New Diseases

(Back To Menu)

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Forage Crops

No New Diseases

(Back To Menu)

---

Fruit Crops

No New Diseases

(Back To Menu)

---

Herbaceous Ornamentals

No New Diseases

(Back To Menu)

---

Houseplants

No New Diseases

(Back To Menu)

---

Needled Woody Ornamentals

No New Diseases

(Back To Menu)

---

Vegetable Crops

No New Diseases

(Back To Menu)

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Specialty Crops

No New Diseases

(Back To Menu)

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Miscellaneous

No New Entries

(Back To Menu)

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Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from January 3, 2026 through January 9, 2026.

 

 

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Broad-Leafed Woody Ornamentals

No New Diseases

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Field Crops

No New Diseases

(Back To Menu)

---

Forage Crops

No New Diseases

(Back To Menu)

---

Fruit Crops

No New Diseases

(Back To Menu)

---

Herbaceous Ornamentals

No New Diseases

(Back To Menu)

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Houseplants

No New Diseases

(Back To Menu)

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Needled Woody Ornamentals

Plant:  Pine (White)
Disease/Disorder:  Chlorosis (Suspected)
Pathogen:  None
County:  Dane

Plant:  Pine (White)
Disease/Disorder:  Sooty Mold 
Pathogen:  Miscellaneous sooty mold fungi
County:  Dane

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Vegetable Crops

No New Diseases

(Back To Menu)

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Specialty Crops

No New Diseases

(Back To Menu)

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Miscellaneous

No New Entries

(Back To Menu)

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Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from December 27, 2025 through January 2, 2026.

 

 

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Broad-Leafed Woody Ornamentals

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

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Field Crops

No New Diseases

(Back To Menu)

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Forage Crops

No New Diseases

(Back To Menu)

---

Fruit Crops

No New Diseases

(Back To Menu)

---

Herbaceous Ornamentals

No New Diseases

(Back To Menu)

---

Houseplants

No New Diseases

(Back To Menu)

---

Needled Woody Ornamentals

No New Diseases

(Back To Menu)

---

Vegetable Crops

No New Diseases

(Back To Menu)

---

Specialty Crops

No New Diseases

(Back To Menu)

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Miscellaneous

No New Entries

(Back To Menu)

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Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from December 13, 2025 through December 19, 2025.

 

 

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Broad-Leafed Woody Ornamentals

No New Diseases

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Field Crops

No New Diseases

(Back To Menu)

---

Forage Crops

No New Diseases

(Back To Menu)

---

Fruit Crops

No New Diseases

(Back To Menu)

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Herbaceous Ornamentals

Plant:  Dahlia
Disease/Disorder:  Crown Gall
Pathogen:  Agrobacterium tumefaciens
County:  Warren (NY)

Plant:  Phlox
Disease/Disorder:  Leafy Gall
Pathogen:  Rhodococcus facians
County:  Ottawa (MI)

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Houseplants

No New Diseases

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Needled Woody Ornamentals

Plant:  Juniper 
Disease/Disorder:  Cytospora Canker
Pathogen:  Cytospora sp.
County:  Dane

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

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Vegetable Crops

No New Diseases

(Back To Menu)

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Specialty Crops

No New Diseases

(Back To Menu)

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Miscellaneous

No New Entries

(Back To Menu)

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Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from December 6, 2025 through December 12, 2025.

 

 

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Broad-Leafed Woody Ornamentals

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

Plant:  Boxwood
Disease/Disorder:  Volutella Canker
Pathogen:  Volutella sp.
Counties:  Milwaukee, Waukesha

Plant:  Oak (Unspecified)
Disease/Disorder:  Brittle Cinder (Suspected)
Pathogen:  Kretzschmaria deusta
County:  Dane

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Field Crops

No New Diseases

(Back To Menu)

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Forage Crops

No New Diseases

(Back To Menu)

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Fruit Crops

Plant:  Raspberry
Disease/Disorder:  Root/Crown Rot
Pathogen:  Rhizoctonia sp.
County:  Dane

Plant:  Strawberry
Disease/Disorder:  Phomopsis Leaf Blotch
Pathogen:  Phomopsis sp.
County:  Dane

Plant:  Strawberry
Disease/Disorder:  Root Rot
Pathogens:  Phytophthora sp., Pythium sp.
County:  Dane

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Herbaceous Ornamentals

Plant:  Aster
Disease/Disorder:  Leafy Gall
Pathogen:  Rhodococcus facians
County:  Ottawa (MI)

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Houseplants

No New Diseases

(Back To Menu)

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Needled Woody Ornamentals

No New Diseases

(Back To Menu)

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Vegetable Crops

No New Diseases

(Back To Menu)

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Specialty Crops

No New Diseases

(Back To Menu)

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Miscellaneous

No New Entries

(Back To Menu)

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Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from November 29, 2025 through December 5, 2025.

 

 

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Broad-Leafed Woody Ornamentals

No New Diseases

(Back To Menu)

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Field Crops

No New Diseases

(Back To Menu)

---

Forage Crops

No New Diseases

(Back To Menu)

---

Fruit Crops

No New Diseases

(Back To Menu)

---

Herbaceous Ornamentals

No New Diseases

(Back To Menu)

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Houseplants

No New Diseases

(Back To Menu)

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Needled Woody Ornamentals

Plant:  Spruce (Unspecified)
Disease/Disorder:  Fertility Issues (Suspected)
Pathogen:  None
County:  Kenosha

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

Plant:  Spruce (Unspecified)
Disease/Disorder:  Spruce Needle Drop
Pathogen:  Setomelanomma holmii
County:  Kenosha

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Vegetable Crops

No New Diseases

(Back To Menu)

---

Specialty Crops

No New Diseases

(Back To Menu)

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Miscellaneous

No New Entries

(Back To Menu)

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Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from November 22, 2025 through November 28, 2025.

 

 

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Broad-Leafed Woody Ornamentals

No New Diseases

(Back To Menu)

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Field Crops

No New Diseases

(Back To Menu)

---

Forage Crops

No New Diseases

(Back To Menu)

---

Fruit Crops

No New Diseases

(Back To Menu)

---

Herbaceous Ornamentals

No New Diseases

(Back To Menu)

---

Houseplants

No New Diseases

(Back To Menu)

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Needled Woody Ornamentals

Plant:  Arborvitae
Disease/Disorder:  Phomopsis Canker
Pathogen:  Phomopsis sp.
County:  Waukesha

Plant:  Spruce (Norway)
Disease/Disorder:  Phomopsis Canker
Pathogen:  Phomopsis sp.
County:  Waukesha

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Vegetable Crops

No New Diseases

(Back To Menu)

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Specialty Crops

No New Diseases

(Back To Menu)

---

Miscellaneous

No New Entries

(Back To Menu)

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