The PDDC is now once again accepting physical samples for diagnosis, but due to COVID-19, only with limited hours and limited sample processing capacity.  Click here for the current submission policy.  The PDDC is continuing to provide diagnoses through examination of digital photographs.  Digital diagnoses have not traditionally been included in the Wisconsin Disease Almanac, because such diagnoses are not verified through lab testing (critical in most situations for a diagnosis to be accurate).  However, in an attempt to keep clients as informed as possible, digital diagnoses will be included in the Almanac until normal PDDC operations resume.  For Almanac entries below, 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 October 3, 2020 through October 9, 2020.

PLANT/SAMPLE TYPE	DISEASE/DISORDER	PATHOGEN	COUNTY
FRUIT CROPS
Apple	Apple Scab (Suspected) Black Rot Cold Injury (Suspected) Flyspeck Gymnosporangium Rust (Suspected) Sooty Blotch	Venturia inaequalis Botryosphaeria obtusa None Schizothyrium pomi Gymnosporangium sp. Miscellaneous sooty blotch fungi	Dodge Dodge Dane Dodge Dane Dodge

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 Apples, Disease and tagged Apple Scab, Apple Sooty Blotch, Apples, Black Rot, cold injury, disease, flyspeck, gymnosporangium rust, PDDC, Plant Disease Diagnostic Clinic.