Brian Hudelson, Ann Joy, Erin DeWinter and Joyce Wu, 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 August 10, 2013 through August 16, 2013.
Plant/SampleType, Disease/Disorder, Pathogen, County
Field Crops
Corn, Northern Corn Leaf Spot, Bipolaris zeicola, Grant
Soybean, Charcoal Rot, Macrophomina phaseolina, Dane
Soybean, Dicamba Injury, None, Walworth
Soybean, Fusarium Root Rot, Fusarium sp., Trempealeau
Soybean, Soybean Cyst, Heterodera glycines, Trempealeau
Forage Crops
Alfalfa, Aphanomyces Root Rot, Aphanomyces euteiches, Lafayette
Alfalfa, Crown Rot, Fusarium spp., Lafayette
Fruit Crops
Apple, Root/Crown Rot, Phytophthora sp., Pierce
Grape, Downy Mildew, Plasmopara viticola, Dane
Grape, Powdery Mildew, Oidium sp., Dane
Raspberry, Root/Crown Rot, Pythium sp., Rhizoctonia sp., Fusarium sp., Cylindrocarpon sp., Lincoln and Rusk
Vegetables
Chard (Green), Cercospora Leaf Spot, Cercospora sp., Vernon
Chard (Red), Cercospora Leaf Spot, Cercospora sp., Vernon
Kale (Green), Alternaria Leaf Spot, Alternaria brassisicola, Vernon
Kale (Green), Black Rot, Xanthomonas campestris pv. campestris, Vernon
Okra, Alternaria Leaf Spot, Alternaria sp., Vernon
Pepper, Blossom End Rot, None, Vernon
Potato , Late Blight, Phytophthora infestans, Carroll (IL)
Tomato, Bacterial Speck, Pseudomonas syringae pv. tomato Vernon
Tomato, Early Blight, Alternaria solani Vernon
Tomato, Late Blight, Phytophthora infestans Vernon
Tomato, Septoria Leaf Spot, Septoria lycopersici Vernon
Tomato, Sunscald, None, Sauk
Specialty Crops
Hop, Hop Latent Virus, Hop latent virus, Monroe
Soil
Soybean Soil, Soybean Cyst Nematode, Heterodera glycines, Eau Claire, Walworth
For additional information on plant diseases and their control, visit the PDDC website at pddc.wisc.edu.