In 2023, the PDDC continues to provide diagnoses through examination of digital photographs, as well as physical samples.  Click here for the PDDC’s current submission policy, as well as information on the PDDC’s current fee structure.  Digital diagnoses will be included in the Wisconsin Disease Almanac and when a digital diagnosis would normally require a lab confirmation, the disease/disorder will be labeled as “suspected”.  The following diseases/disorders have been identified at the PDDC from July 29, 2023 through August 4, 2023.

PLANT/SAMPLE TYPE	DISEASE/DISORDER	PATHOGEN	COUNTY
FRUIT CROPS
Apple	Cedar-Apple Rust Fire Blight Root/Crown Rot (Suspected)	Gymnosporangium juniper-virginianae Erwinia amylovora Phytophthora sp.	Winnebago Waupaca Jefferson
Grape	Black Rot Chemical Burn (Suspected) Downy Mildew Fertility Issues (Suspected)	Guignardia bidwellii None Plasmopara viticola None	Bayfield Waupaca Bayfield Dane

To learn more about plant diseases and their control, as well as PDDC educational resources and activities, visit the PDDC website at pddc.wisc.edu, follow the clinic on Facebook and Twitter @UWPDDC or email pddc@wisc.edu to subscribe to the PDDC listserv “UWPDDCLearn”.

This article was posted in Disease and tagged Apples, Brian Hudelson, Dante Tauscheck, disease, Grapes, PDDC, Plant Disease Diagnostic Clinic.