UW-Extension/Madison Plant Disease Diagnostic Clinic (PDDC) Update

UW-Extension/Madison Plant Disease Diagnostic Clinic (PDDC) Update

Brian Hudelson, Ann Joy, Amanda Zimmerman and Adam Greene, Plant Disease Diagnostics Clinic

The PDDC receives samples of many plant samples from around the state.  The following diseases/disorders have been identified at the PDDC since January 1, 2012:

PLANT/SAMPLE
TYPE

DISEASE/DISORDER

PATHOGEN

COUNTY

FRUIT CROPS

 

 

 

Apple Cytospora Canker

 

Root Rot

Cytospora sp.

 

Fusarium sp., Phytophthora sp.

Dodge, La Crosse

 

Dane

VEGETABLES

 

 

 

Cucumber Unidentified Viral Disease Unknown Dane
Pea Root Rot Pythium sp., Rhizoctonia sp. Columbia
Potato (Tubers) Elephant Hide

 

Fusarium Dry Rot

 

Leak

 

Pit Scab

None

 

Fusarium sambucinum

 

Pythium sp.

 

Streptomyces scabies

Dunn

 

Dunn, Portage

 

Portage

 

Dunn

Tomato Rhizoctonia Stem Canker Rhizoctonia solani Clark

 

For additional information on plant diseases and their control, visit the PDDC website at pddc.wisc.edu.

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