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

Brian Hudelson, Sean Toporek, Catherine Wendt, Claire Wisniewski, and Ann Joy

The PDDC receives samples of many plant and soil samples from around the state. The following diseases/disorders have been identified at the PDDC from November 14, 2015 through November 20, 2015.

Plant/Sample Type, Disease/Disorder, Pathogen, County

Forage crops
Alfalfa, Root/Crown rot, Pythium sp., Fusarium sp., Fon du Lac

Fruit crops
Apple, Cytospora Canker, Cytospora sp., Bayfield
Apple, Fire BlightErwinia amylovora, Bayfield

Cabbage, Grey leaf spot, Alternaria brassicicola, Outagamie
Carrot, Cottony Rot/White MoldSclerotia sclerotiorum, Dane
Carrot, Crown Rot, Rhizoctonia sp., Dane
Carrot, Fusarium Dry Rot, Fusarium sp., Dane

Soybean cyst nematode, Heterodera glycines, Kenosha, Lafayette, Outagamie, Pepin, Racine

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

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