Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from May 3, 2025 through May 9, 2025.

 

 

---

Broad-Leafed Woody Ornamentals

Plant:  Crabapple
Disease/Disorder:  Lichens
Pathogen:  None
County:  Dane

Plant:  Oak (Unspecified)
Disease/Disorder:  Armillaria Root Disease
Pathogen:  Armillaria sp.
County:  Waukesha

Plant:  Oak (Unspecified)
Disease/Disorder:  White Rot
Pathogen:  Trichaptum biforme
County:  Waukesha

(Back To Menu)

---

Field Crops

No New Diseases

(Back To Menu)

---

Forage Crops

No New Diseases

(Back To Menu)

---

Fruit Crops

Plant:  Apple
Disease/Disorder:  Frost Crack
Pathogen:  None
County:  Sauk

Plant:  Apple
Disease/Disorder:  Sap Rot
Pathogen:  Schizophyllum commune
County:  Sauk

Plant:  Nectarine
Disease/Disorder:  Peach Leaf Curl
Pathogen:  Taphrina deformans
County:  Nassau (NY)

(Back To Menu)

---

Herbaceous Ornamentals

Plant:  Geranium
Disease/Disorder:  Iron/Manganese Toxicity (Suspected)
Pathogen:  None
County:  Dane

Plant:  Lobelia
Disease/Disorder:  Heat Stress (Suspected)
Pathogen:  None
County:  Jefferson

Plant:  Pachysandra
Disease/Disorder:  Volutella Blight
Pathogen:  Volutella pachysandricola
Counties:  Milwaukee, Waukesha

Plant:  Pachysandra
Disease/Disorder:  Winter Injury (Suspected)
Pathogen:  None
Counties:  Milwaukee, Waukesha

Plant:  Phlox (Garden)
Disease/Disorder:  Phytoplasma Disease
Pathogen:  Unspecified Phytoplasma
County:  Green

Plant:  Phlox (Garden)
Disease/Disorder:  Root Rot
Pathogen:  Pythium sp.
County:  Green

(Back To Menu)

---

Houseplants

No New Diseases

(Back To Menu)

---

Needled Woody Ornamentals

Plant:  Arborvitae
Disease/Disorder:  Cytospora Canker
Pathogen:  Cytospora sp.
County:  Milwaukee

Plant:  Arborvitae
Disease/Disorder:  Root Rot
Pathogen:  Phytophthora sp.
County:  Waukesha

Plant:  Hemlock (Eastern)
Disease/Disorder:  Root Rot
Pathogen:  Phytophthora sp.
County:  Dane

Plant:  Juniper
Disease/Disorder:  Winter Burn (Suspected)
Pathogen:  None
County:  Milwaukee

Plant:  Pine (Scots)
Disease/Disorder:  Diplodia Shoot Blight and Canker
Pathogen:  Diplodia sp.
County:  Waukesha

Plant:  Spruce (Norway)
Disease/Disorder:  Rhizosphaera Needle Cast
Pathogen:  Rhizosphaera kalkhoffii
County:  Waukesha

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

Plant:  Spruce (Unspecified)
Disease/Disorder:  Transplant Shock
Pathogen:  None
County:  Dane

Plant:  Spruce (Unspecified)
Disease/Disorder:  Water Stress
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 Reports

(Back To Menu)

---