Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from July 26, 2025 through August 1, 2025.

 

 

---

Broad-Leafed Woody Ornamentals

Plant:  Beech (Weeping)
Disease/Disorder:  Root Rot
Pathogen:  Pythium sp.
County:  Waukesha

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

Plant:  Dogwood (Pagoda)
Disease/Disorder:  Golden Canker
Pathogen:  Cryptodiaporthe corni
County:  Dane

Plant:  Ginkgo
Disease/Disorder:  Root Rot
Pathogens:  Phytophthora sp., Fusarium sp.
County:  Portage

Plant:  Honeysuckle (Dwarf Bush)
Disease/Disorder:  Fusarium Canker
Pathogen:  Fusarium sp.
County:  Waukesha

Plant:  Kentucky Coffee Tree
Disease/Disorder:  Root Rot
Pathogen:  Fusarium sp.
County:  Dane

Plant:  Maple (Unspecified)
Disease/Disorder:  Anthracnose
Pathogen:  Discula sp.
County:  Green

Plant:  Maple (Unspecified)
Disease/Disorder:  Chlorosis
Pathogen:  None
County:  Milwaukee

Plant:  Maple (Unspecified)
Disease/Disorder:  Lichens
Pathogen:  None
County:  Milwaukee

Plant:  Maple (Unspecified)
Disease/Disorder:  Sunburn
Pathogen:  None
County:  Waukesha

Plant:  Oak (Bur)
Disease/Disorder:  Chlorosis
Pathogen:  None
County:  Dane

Plant:  Oak (Unspecified)
Disease/Disorder:  Oak Wilt
Pathogen:  Bretziella fagacearum
County:  Winong (MN)

Plant:  Spirea
Disease/Disorder:  Anthracnose
Pathogen:  Colletotrichum sp.
County:  Waukesha

Plant:  Willow
Disease/Disorder:  Anthracnose
Pathogen:  Monostichella salicis
County:  St. Croix

(Back To Menu)

---

Field Crops

Plant:  Mint
Disease/Disorder:  Root Rot
Pathogen:  Rhizoctonia sp.
County:  Rock

Plant:  Soybean
Disease/Disorder:  Charcoal Rot
Pathogen:  Macrophomina phaseolina
County:  Dane

Plant:  Soybean
Disease/Disorder:  Fusarium Root Rot
Pathogen:  Fusarium sp.
Counties:  Dane, Oneida

Plant:  Soybean
Disease/Disorder:  Phytophthora Root and Stem Rot
Pathogen:  Phytophthora sp.
County:  Oneida

(Back To Menu)

---

Forage Crops

No New Diseases

(Back To Menu)

---

Fruit Crops

Plant:  Apple
Disease/Disorder:  Cytospora Canker
Pathogen:  Cytospora sp.
County:  Dane

Plant:  Apple
Disease/Disorder:  Chemical Burn
Pathogen:  None
County:  Dane

Plant:  Apple
Disease/Disorder:  Root Rot
Pathogen:  Cylindrocarpon sp.
County:  Dane

(Back To Menu)

---

Herbaceous Ornamentals

Plant:  Ginger (European)
Disease/Disorder:  White Mold
Pathogen:  Sclerotinia sclerotiorum
County:  Waukesha

Plant:  Hosta
Disease/Disorder:  Cucumber Mosaic
Pathogen:  Cucumber mosaic virus
County:  Racine

Plant:  Hosta
Disease/Disorder:  Hosta Virus X
Pathogen:  Hosta virus X
County:  Racine

Plant:  Hosta
Disease/Disorder:  Southern Blight
Pathogen:  Athelia rolfsii
County:  Dane

(Back To Menu)

---

Houseplants

No New Diseases

(Back To Menu)

---

Needled Woody Ornamentals

Plant:  Juniper
Disease/Disorder:  Diplodia Shoot Blight and Canker
Pathogen:  Diplodia sp.
County:  Manitowoc

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

Plant:  Spruce (Unspecified)
Disease/Disorder:  Cytospora Canker
Pathogen:  Cytospora sp.
County:  Waukesha

Plant:  Spruce (Unspecified)
Disease/Disorder:  Fertility Issues (Suspected)
Pathogen:  None
County:  Los Angeles (CA)

Plant:  Spruce (Unspecified)
Disease/Disorder:  Herbicide Damage (Suspected)
Pathogen:  None
County:  Ozaukee

Plant:  Spruce (Unspecified)
Disease/Disorder:  Winter Burn (Suspected)
Pathogen:  None
County:  Waukesha

Plant:  Yew
Disease/Disorder:  Root Rot
Pathogens:  Phytophthora sp., Pythium sp.
County:  Ozaukee

Plant:  Yew
Disease/Disorder:  Twig Blight
Pathogen:  Phyllosticta sp.
Counties:  Dane, Ozaukee

(Back To Menu)

---

Vegetable Crops

Plant:  Cabbage
Disease/Disorder:  Basil Stem Rot
Pathogen:  Rhizoctonia sp.
County:  Dane

Plant:  Cabbage
Disease/Disorder:  Black Rot
Pathogen:  Xanthomonas campestris pv. campestris
County:  Dane

Plant:  Celery
Disease/Disorder:  Anthracnose
Pathogen:  Colletotrichum sp.
County:  Waushara

Plant:  Cucumber
Disease/Disorder:  Anthracnose (Suspected)
Pathogen:  Colletotrichum orbiculare
County:  Portage

Plant:  Onion
Disease/Disorder:  Dog Vomit Slime Mold
Pathogen:  None
County:  Douglas

Plant:  Pepper
Disease/Disorder:  Charcoal Rot
Pathogen:  Macrophomina phaseolina
County:  Racine

Plant:  Pepper
Disease/Disorder:  Root Rot
Pathogen:  Pythium sp.
County:  Racine

Plant:  Tomato
Disease/Disorder:  Blossom End Rot
Pathogen:  None
County:  Brown

Plant:  Tomato
Disease/Disorder:  Catface
Pathogen:  None
County:  Brown

Plant:  Tomato
Disease/Disorder:  Herbicide Damage (Suspected)
Pathogen:  None
County:  Brown

Plant:  Tomato
Disease/Disorder:  Root Rot
Pathogen:  Pythium sp.
County:  Racine

(Back To Menu)

---

Specialty Crops

No New Diseases

(Back To Menu)

---

Miscellaneous

No New Entries

(Back To Menu)

---