UW/UWEX Plant Disease Diagnostic Clinic (PDDC) Update, July 28

Brian Hudelson, Sue Lueloff, John Lake 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 July 22, 2017 through July 28, 2017.

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

Field Crops

Soybean, Bacterial Blight, Pseudomonas savastanoi pv. glycinea, Rock

Soybean, Fusarium Root Rot, Fusarium sp., Dodge, Outagamie

Soybean, Stem Canker, Diaporthe phaseolorum, Dodge, Outagamie

Soybean, Brown Spot, Septoria glycines, Rock

Wheat, Scab/Fusarium Head Blight, Fusarium graminearum, Columbia

Wheat, Weathering, None, Columbia

Fruit Crops

Apple, Blister Spot, Pseudomonas syringae pv.  papulans, Winona (MN)

Apple, Cedar-Apple RustGymnosporangium juniperi-virginianae, Sauk

Apricot, Bacterial Canker, Pseudomonas syringae, Milwaukee

Blueberry, Botrytis Blight, Botrytis sp., Washburn

Blueberry, Fusicoccum Canker, Fusicoccum sp., Washburn

Blueberry, Root RotPythium sp., Washburn

Cherry, Cherry Leaf Spot, Blumeriella jaapii, Milwaukee

Rhubarb, Root/Crown Rot, Pythium sp., Rock

Strawberry, Root/Crown Rot, Pythium sp., Fusarium sp., Bayfield, Wood

Vegetable Crops

Asparagus, Root/Crown Rot, Fusarium sp., Pythium sp., Rhizoctonia sp. , Jackson

Cucumber, Pseudomonas Fruit Rot, Pseudomonas sp., Dane

Garlic, Fusarium Basal Plate Rot, Fusarium oxysporum, Grant

Pepper, Syringae Leaf Spot, Pseudomonas syringae pv. syringae, Rock

Potato, Black Leg, Dickeya dianthicola, Portage

Squash (Butternut), Angular Leaf Spot, Pseudomonas syringae pv. lachrymans, Rock

Squash (Unspecified), Root/Crown Rot, Pythium sp., Fusarium sp., Dane

Tomato, Bacterial Canker, Clavibacter michiganensis subsp. michiganensis, Walworth

Tomato, Late Blight, Phytophthora infestans, Waukesha

Tomato, Septoria Leaf Spot, Septoria lycopersici, Green Lake

For additional information on plant diseases and their control, visit the PDDC website at pddc.wisc.edu.
Follow the clinic on Facebook and Twitter @UWPDDC.