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 September 5, 2020 through September 11, 2020.

PLANT/SAMPLE TYPE	DISEASE/DISORDER	PATHOGEN	COUNTY
FRUIT CROPS
Apple (‘Honeycrisp’)	Zonal Leaf Chlorosis	None	Columbia
Apple (Unspecified)	Canker Disease Chlorosis Flyspeck Frost Crack Gymnosporangium Rust Overly Deep Planting (Suspected) Phomopsis Canker Root Rot Root Rot (Suspected) Sap Rot Sooty Blotch Water Stress (Suspected)	Unspecified canker pathogen None Schizothyrium pomi None Gymnosporangium sp. None Phomopsis sp. Fusarium oxysporum Unspecified root rot fungi/water molds Schizophyllum commune Miscellaneous sooty blotch fungi None	Grant Columbia Portage Lincoln Columbia, Grant Lincoln Waupaca Waupaca Columbia Lincoln Portage Columbia
Cranberry	Blotch Rot Early Rot	Physalospora vaccinii Phyllosticta vaccinii	Wood Wood
Grape	Downy Mildew Ripe Rot	Plasmopara viticola Colletotrichum sp.	Vilas Dane
Raspberry	Root/Crown Rot (Suspected)	Unspecified root/crown rot fungus/water molds	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, Berries, Cranberry, Disease, Grapes and tagged Apple Sooty Blotch, Apples, blotch rot, canker disease, chlorosis, Cranberries, cranberry, Downy mildew, Early Rot, flyspeck, frost crack, Grapes, gymnosporangium rust, Honeycrisp, overly deep planting, phomopsis canker, Raspberries, ripe rot, root rot, Root/Crown Rot, sap rot, water stress, zonal leaf chlorosis.