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

Brian Hudelson, Sean Toporek, Ann Joy and Joyce Wu

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 13, 2015 through June 19, 2015.

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

Field Crops
Corn, Seedling Blight, Fusarium sp., Sauk
Soybean, Seedling Blight/ Root Rot, Pythium sp., Rhizoctonia sp., Fusarium sp., Brown, Grant, Marathon
Wheat, Cephalosporium Stripe, Cephalosporium gramineum, Vernon

Forage Crops
Alfalfa, Crown Rot, Phomo sp., Fusarium sp., Jefferson

Fruit Crops
Blueberry, Sphaeropsis Canker, Sphaeropsis sp., Jefferson

Vegetables
Cucumber, Unspecified Potyvirus Disease, Unspecified potyvirus, Columbia
Onion, Seedling Blight, Pythium sp., Fusarium sp., Columbia
Onion, Stemphylium Leaf Blight, Stemphylium sp., Columbia
Tomato, Root Rot, Pythium sp., Fusarium sp., Dane
Tomato, Septoria Leaf Spot, Septoria lycopersici, Sauk

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