Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from April 11, 2026 through April 17, 2026.

 

 

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Broad-Leafed Woody Ornamentals

Plant:  Elm (American)
Disease/Disorder:  Dutch elm disease
Pathogen:  Ophiostoma sp.
County:  Jefferson

Plant:  Hickory
Disease/Disorder:  Wood rot (suspected)
Pathogen:  Unidentified wood rot fungus
County:  Dane

Plant:  Lilac
Disease/Disorder:  Root rot
Pathogens:  Pythium sp., Fusarium sp.
County:  Columbia

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Field Crops

No New Diseases

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Forage Crops

No New Diseases

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Fruit Crops

No New Diseases

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Herbaceous Ornamentals

Plant:  Impatiens
Disease/Disorder:  Cucumber mosaic
Pathogen:  Cucumber mosaic virus
County:  Vernon

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Houseplants

No New Diseases

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Needled Woody Ornamentals

Plant:  Fir (White)
Disease/Disorder:  Phyllosticta needle blight
Pathogen:  Phyllosticta sp.
County:  DuPage (IL)

Plant:  Spruce (Norway)
Disease/Disorder:  Phomopsis Canker
Pathogens:  Phomopsis sp.
County:  DuPage (IL)

Plant:  Spruce (Norway)
Disease/Disorder:  Root rot
Pathogens:  Pythium sp.
County:  DuPage (IL)

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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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