Compiled by Brian Hudelson and Dante Tauscheck
The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from May 31, 2025 through June 6, 2025.
Broad-Leafed Woody Ornamentals
Plant: Aspen
Disease/Disorder: Herbicide Damage
Pathogen: None
County: Dane
Plant: Buckthorn (Fern Leaf)
Disease/Disorder: Crown Rust
Pathogen: Puccinia coronata
County: Dane
Plant: Hawthorn
Disease/Disorder: Cedar-Quince Rust
Pathogen: Gymnosporangium clavipes
County: Dane
Plant: Hawthorn
Disease/Disorder: Improper Planting
Pathogen: None
County: Dane
Plant: Lilac (Japanese Tree)
Disease/Disorder: Cold Injury (Suspected)
Pathogen: None
County: Dane
Plant: Maple (Unspecified)
Disease/Disorder: Anthracnose
Pathogen: Discula sp.
County: Lafayette
Plant: Oak (Bur)
Disease/Disorder: Herbicide Damage
Pathogen: None
County: Dane
Plant: Rose
Disease/Disorder: Phomopsis/Diaporthe Canker
Pathogen: Phomopsis sp./Diaporthe sp.
County: Milwaukee
Plant: Rose
Disease/Disorder: Virus Disease
Pathogen: Unspecified virus
County: Milwaukee
Plant: Witch-Hazel
Disease/Disorder: Herbicide Damage
Pathogen: None
County: Dodge
Field Crops
No New Diseases
Forage Crops
No New Diseases
Fruit Crops
Plant: Peach
Disease/Disorder: Peach Leaf Curl
Pathogen: Taphrina deformans
Counties: Washington, Waukesha
Herbaceous Ornamentals
Plant: Geranium (Perennial)
Disease/Disorder: Polygonum-Geranium Rust
Pathogen: Puccinia polygoni-amphibii
County: Rock
Houseplants
No New Diseases
Needled Woody Ornamentals
Plant: Arborvitae
Disease/Disorder: Urine Damage (Suspected)
Pathogen: None
County: Milwaukee
Plant: Pine (Red)
Disease/Disorder: Diplodia Shoot Blight and Canker
Pathogen: Diplodia sp.
County: Dane
Plant: Pine (White)
Disease/Disorder: White Pine Blister Rust
Pathogen: Cronartium ribicola
County: Dane
Vegetable Crops
No New Diseases
Specialty Crops
No New Diseases
Miscellaneous
No New Reports