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 July 18, 2015 through July 24 2015.
Plant/Sample Type, Disease/Disorder, Pathogen, County
Field Crops
Soybean, Potassium Deficiency, none, Sauk
Fruit Crops
Apple, Black Rot, Sphaeropsis sp., Oneida
Apple, Cedar Apple Rust, Gymnosporangium juniperi-virginianae, Iowa
Apple, Fire Blight, Erwinia amylovora, Oneida
Apple, Root/Crown Rot, Phytophthora sp., Pythium sp, Kenosha, Sawyer
Cranberry, Tobacco Streak, Tobacco Streak Virus, Monroe
Cherry, Cheery Leaf Spot, Blumeriella jaapii, Rock
Grape, Black Rot, Phyllosticta ampelicida, Dane, Polk
Honeyberry, Powdery Mildew, Microsphaera sp., Dane
Strawberry, Angular Leaf Spot, Xanthomonas fragariae, Iowa
Strawberry, Root/Crown Rot, Fusarium sp., Iowa
Vegetables
Onion, Downy Mildew, Peronospora destructor, Rock
Onion, Purple Blotch, Alternaria porri, Rock
Onion, Stemphylium Leaf Blight, Stemphylium sp, Rock, Columbia
Potato, Early Blight, Alternaria solani, Portage
Snap Beans, Ashy Stem Blight, Macrophomina phaseolina, Waushara
Snap Beans, Root/Crown Rot, Fusarium spp., Waushara
Soybean (Edible), Root/Crown Rot, Fusarium sp., Chippewa
Soybean (Edible), Target Spot, Corynespora cassiicola, Chippewa
Tomato, Catfacing, none, Iowa
Tomato, Cucumber Mosaic, Cucumber Mosaic Virus, Iowa, Grant, Winnebago
Tomato, Septoria Leaf Spot, Septoria lycopersici, Iowa, Portage
Tomato, Tobacco Mosaic, Tobacco Mosaic Virus, Iowa, Grant, St. Croix, Winnebago
Tomato, Tomato Spotted Wilt, Tomato Spotted Wilt Virus, Grant, St. Croix
Soil
Alfalfa Soil, Aphanomyces Seedling Blight, Aphanomyces euteiches race 2, Houston (MN)
Alfalfa Soil, Phytophthora Seeding Blight, Phytophthora medicaginis, Houston (MN)
For additional information on plant diseases and their control, visit the PDDC website at pddc.wisc.edu