UW-Extension/Madison Plant Disease Diagnostic Clinic (PDDC) Update 9/20-9/26

Brian Hudelson, Ann Joy, Joyce Wu, Tom Hinsenkamp, and Catherine Wendt, Plant Disease Diagnostics Clinic

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 September 20, 2014 through September 26, 2014.

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

FIELD CROPS,

Soybean, Cercospora Leaf Blight, Cercospora kikuchii, Sheboygan

Soybean, Root Rot, Rhizoctonia solani, Pythium sp., Fusarium sp., Sheboygan

Soybean, Sudden Death Syndrome, Fusarium virguliforme, Dodge

FRUIT CROPS,

Currant, Gloeosporidiella Leaf Spot, Gloeosporidiella sp., Milwaukee

Pear, Scab, Venturia pirina, Portage

Strawberry, Root/Crown Rot, Rhizoctonia solani, Dunn

SPECIALITY CROPS,

Hops, Downy Mildew, Pseudoperonospora humuli, Dodge

VEGETABLES,

Cabbage, Black Rot, Xanthomonas campestris, Brown

Cucumber, Cercospora Leaf Spot, Cercospora sp., Milwaukee

Cucumber, Downy Mildew, Pseudoperonospora cubensis, Milwaukee

Kale, Black Rot, Xanthomonas campestris, Brown

Pumpkin, Angular Leaf Spot, Pseudomonas syringae pv. lachrymans, Wood

Pumpkin, Powdery Mildew, Oidium sp., Wood

SOIL,

Soybean Soil, Soybean Cyst Nematode, Heterodera glycines, Eau Claire, Ozaukee, Sheboygan, Trempealeau, Washington

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

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