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

Brian Hudelson, Sean Toporek, 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 June 4, 2016 through June 10, 2016.

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

Field Crops
Oats, Phyllosticta Leaf Spot, Phyllosticta sp., Sauk
Oats, Red Leaf (Suspected), Barley yellow dwarf virus, Sauk

Forage Crops
Alfalfa, Aphanomyces Root Rot,  Aphanomyces euteiches, Walworth
Pythium Root Rot, Pythium sp., Walworth

Fruit Crops
Cherry, Bacterial Canker, Pseudomonas syringae, Dane
Cherry, Brown Rot, Monilinia sp., Dane
Grape, Antracnose, Sphaceloma ampelinum, Dane
Raspberry, Unidentified Viral Disease, Unidentified virus, Monroe

Vegetable Crops
Tomato, Herbicide Damage, None, Dane

Specialty Crops
Hop, Downy Mildew, Pseudoperonospora humuli, Fond du Lac


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

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