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

Brian Hudelson, Sean Toporek, Jake Kurczewski 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 26, 2016 through December 2, 2016.

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

Field Crops
Wheat, Barley Yellow Dwarf, Barley yellow dwarf virus, Walworth

Forage Crops
Alfalfa, Aphanomyces Root Rot, Aphanomyces euteiches, Dane
Alfalfa, Common Leaf Spot, Pseudopeziza medicaginis, Dane
Alfalfa,Pythium Root Rot, Pythium sp., Dane
Alfalfa, Rust, Uromyces sp., Dane

Vegetable Crops
Broccoli, Tobacco Mosaic, Tobacco mosaic virus, Milwaukee
Potato, Late Blight, Phytophthora infestans, Rock
Tomato, Tobacco Mosaic, Tobacco mosaic virus, Jackson

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

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