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 18, 2016 through June 24, 2016.

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

Field Crops
Corn, Northern Corn Leaf Blight, Exserohilum turcicum, Dane, Juneau, Jackson
Corn, Seedling Blight, Pythium sp., Fusarium spp., Dodge, Iowa
Soybean, Root Rot, Pythium sp., Walworth

Fruit Crops
Cherry, Cold Injury, None, Dane
Raspberry, Herbicide Damage, None, Dane
Raspberry, Root/Crown Rot, Pythium sp., Rhizoctonia sp., Fusarium spp., Waushara
Strawberry, Common Leaf Spot, Myscosphaerella fragariae, Jackson

Vegetable Crops
Cucumber, Damping-Off, Pythium sp., Fusarium sp., Waushara
Garlic, Stem and Bulb Nematode, Ditylenchus dipsaci, Dane
Pea, Ascochyta Blight, Ascochyta sp., Richland
Potato, Black Leg, Dickey sp., Portage
Potato, Early Blight, Altemaria solani, Columbia
Tomato, Bacterial Canker, Clavibacter michiganensis subsp. michiganensis, Outagamie, Winnebago
Tomato, Tomato Spotted Wild, Tomato spotted wilt virus, Dane

Alfalfa Soil, Aphanomyces Seedling Blight, Aphanomyces euteiches race 1 and race 2, Dane
Soybean Soil, Soybean Cyst Nematode, Heterodera glycines, Jefferson

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