Compiled by Brian Hudelson and Dante Tauscheck
The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from April 5, 2025 through April 11, 2025.
Broad-Leafed Woody Ornamentals
Plant: Boxwood
Disease/Disorder: Volutella Canker
Pathogen: Volutella sp.
County: Dane
Plant: Crabapple
Disease/Disorder: Cedar-Apple Rust
Pathogen: Gymnosporangium juniperi-virginianae
County: Washington
Plant: Oak (Bur)
Disease/Disorder: Diplodia Canker
Pathogen: Diplodia sp.
County: Eau Claire
Field Crops
No New Diseases
Forage Crops
No New Diseases
Fruit Crops
No New Diseases
Herbaceous Ornamentals
Plant: Astilbe
Disease/Disorder: Tobacco Rattle
Pathogen: Tobacco rattle virus
County: Dane
Plant: Geranium
Disease/Disorder: Black Leg
Pathogen: Pythuim sp.
County: Winnebago
Plant: Geranium
Disease/Disorder: Cucumber Mosaic
Pathogen: Cucumber mosaic virus
County: Jefferson
Plant: Geranium
Disease/Disorder: Root Rot
Pathogen: Pythuim sp., Rhizoctonia sp.
County: Winnebago
Plant: Ranunculus
Disease/Disorder: Tobacco Rattle
Pathogen: Tobacco rattle virus
County: Jefferson
Houseplants
No New Diseases
Needled Woody Ornamentals
Plant: Spruce (Unspecified)
Disease/Disorder: Phomopsis Canker
Pathogen: Phomopsis sp.
County: Winnebago
Plant: Spruce (Unspecified)
Disease/Disorder: Rhizosphaera Needle Cast
Pathogen: Rhizosphaera kalkhoffii
County: Winnebago
Vegetable Crops
Plant: Potato
Disease/Disorder: Bacterial Soft Rot
Pathogen: Pectobacterium carotovorum subsp. carotovorum, Pectobacterium parmentieri
County: Waushara
Plant: Potato
Disease/Disorder: Common scab
Pathogen: Streptomyces scabies
County: Waushara
Specialty Crops
No New Diseases
Miscellaneous
No New Reports