Compiled by Brian Hudelson and Dante Tauscheck
The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from March 7, 2026 through March 13, 2026.
Page Table of Contents
Click the links below to jump to the document section.
Broad-Leafed Woody Ornamentals
No New Diseases
(Back To Menu)
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
Plant: Cuphea
Disease/Disorder: Intumescence
Pathogen: None
County: Jefferson
Plant: Dahlia
Disease/Disorder: Crown Gall
Pathogen: Agrobacterium tumefaciens
County: Rock
(Back To Menu)
Houseplants
No New Diseases
(Back To Menu)
Needled Woody Ornamentals
Plant: Spruce (Norway)
Disease/Disorder: Winter Burn
Pathogen: None
County: Waukesha
(Back To Menu)
Vegetable Crops
No New Diseases
(Back To Menu)
Specialty Crops
No New Diseases
(Back To Menu)
Miscellaneous
No New Entries
(Back To Menu)
Compiled by Brian Hudelson and Dante Tauscheck
The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from February 28, 2026 through March 6, 2026.
Page Table of Contents
Click the links below to jump to the document section.
Broad-Leafed Woody Ornamentals
No New Diseases
(Back To Menu)
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)
Needled Woody Ornamentals
No New Diseases
(Back To Menu)
Vegetable Crops
Plant: Potato
Disease/Disorder: Black Scurf
Pathogen: Rhizoctonia solani
County: Portage
Plant: Potato
Disease/Disorder: Fusarium Dry Rot
Pathogen: Fusarium sp.
County: Portage
Plant: Potato
Disease/Disorder: Silver Scurf
Pathogen: Helminthosporium solani
County: Portage
(Back To Menu)
Specialty Crops
No New Diseases
(Back To Menu)
Miscellaneous
No New Entries
(Back To Menu)
Compiled by Brian Hudelson and Dante Tauscheck
The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from February 21, 2026 through February 27, 2026.
Page Table of Contents
Click the links below to jump to the document section.
Broad-Leafed Woody Ornamentals
No New Diseases
(Back To Menu)
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
Plant: Impatiens (New Guinea)
Disease/Disorder: Root Rot
Pathogen: Pythium sp.
County: Adams
(Back To Menu)
Houseplants
No New Diseases
(Back To Menu)
Needled Woody Ornamentals
Plant: Fir (Unspecified)
Disease/Disorder: Gelatinosporium Canker
Pathogen: Gelatinosporium sp.
County: Shawano
Plant: Fir (Unspecified)
Disease/Disorder: Rhizosphaera Needle Cast
Pathogen: Rhizosphaera sp.
County: Shawano
Plant: Hemlock (Canadian)
Disease/Disorder: Phomopsis Canker
Pathogen: Phomopsis sp.
County: Dane
(Back To Menu)
Vegetable Crops
No New Diseases
(Back To Menu)
Specialty Crops
No New Diseases
(Back To Menu)
Miscellaneous
No New Entries
(Back To Menu)
Compiled by Brian Hudelson and Dante Tauscheck
The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from February 14, 2026 through February 20, 2026.
Page Table of Contents
Click the links below to jump to the document section.
Broad-Leafed Woody Ornamentals
No New Diseases
(Back To Menu)
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)
Needled Woody Ornamentals
Plant: Arborvitae
Disease/Disorder: Animal Feeding Damage (Suspected)
Pathogen: None
County: Ozaukee
Plant: Pine (White
Disease/Disorder: Armillaria Root Disease
Pathogen: Armillaria sp.
County: Waukesha
Plant: Spruce (Blue)
Disease/Disorder: Rhizosphaera Needle Cast
Pathogen: Rhizosphaera kalkhoffii
County: Kenosha
(Back To Menu)
Vegetable Crops
No New Diseases
(Back To Menu)
Specialty Crops
No New Diseases
(Back To Menu)
Miscellaneous
No New Entries
(Back To Menu)
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.
Page Table of Contents
Click the links below to jump to the document section.
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
(Back To Menu)
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)
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)
Miscellaneous
No New Entries
(Back To Menu)
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.
Page Table of Contents
Click the links below to jump to the document section.
Broad-Leafed Woody Ornamentals
No New Diseases
(Back To Menu)
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)
Needled Woody Ornamentals
No New Diseases
(Back To Menu)
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
(Back To Menu)
Specialty Crops
No New Diseases
(Back To Menu)
Miscellaneous
No New Entries
(Back To Menu)
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.
Page Table of Contents
Click the links below to jump to the document section.
Broad-Leafed Woody Ornamentals
No New Diseases
(Back To Menu)
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
Plant: Bleeding Heart
Disease/Disorder: Phytoplasma Disease
Pathogen: Unspecified phytoplasma
County: Ottawa (MI)
(Back To Menu)
Houseplants
Plant: Hibiscus
Disease/Disorder: Anthracnose
Pathogen: Colletotrichum sp.
County: Milwaukee
Plant: Mandevilla
Disease/Disorder: Anthracnose
Pathogen: Colletotrichum sp./Glomerella sp.
County: Milwaukee
(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)
Miscellaneous
No New Entries
(Back To Menu)
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.
Page Table of Contents
Click the links below to jump to the document section.
Broad-Leafed Woody Ornamentals
Plant: Cottonwood
Disease/Disorder: White Rot
Pathogen: Cerioporus (Polyporus) squamosus
County: Dane
(Back To Menu)
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)
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)
Miscellaneous
No New Entries
(Back To Menu)
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.
Page Table of Contents
Click the links below to jump to the document section.
Broad-Leafed Woody Ornamentals
No New Diseases
(Back To Menu)
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)
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
(Back To Menu)
Vegetable Crops
No New Diseases
(Back To Menu)
Specialty Crops
No New Diseases
(Back To Menu)
Miscellaneous
No New Entries
(Back To Menu)
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.
Page Table of Contents
Click the links below to jump to the document section.
Broad-Leafed Woody Ornamentals
Plant: Maple (Japanese)
Disease/Disorder: Phomopsis Canker
Pathogen: Phomopsis sp.
County: Dane
(Back To Menu)
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)
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)
Miscellaneous
No New Entries
(Back To Menu)
University of Wisconsin-Madison
