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

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 June 21, 2014 through June 27, 2014.

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

FIELD CROPS,

Corn, Seedling Blight, Pythium sp., Fusarium spp., Barron

Soybean, Herbicide Damage, None, Adams

FRUIT CROPS,

Apple, Black Rot, Diplodia sp., Walworth

Apple, Phomopsis Canker, Phomopsis sp., Marathon

Apple, Valsa Canker, Valsa sp./Cytospora sp., Marathon

Apple, Winter Injury, None, Portage, Walworth

Grape, Anthracnose, Sphaceloma ampelinum, Columbia

Peach, Peach Leaf Curl, Taphrina deformans, Dane

Peach, Winter Injury, None, Dane

VEGETABLES,

Pepper, Bacterial Spot, Xanthomonas campestris pv. vesicatoria, Dane

Rhubarb, Ramularia Leaf Spot, Ramularia sp., Dane

Rhubarb, Slug Injury, None, Dane

Tomato, Herbicide Damage, None, Clark

SOIL,

Soybean Soil, Soybean Cyst Nematode, Heterodera glycines, Rock

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