In 2021, the PDDC continues with limited hours and limited sample processing capacity due to COVID-19.  Click here for the PDDC’s current submission policy.  The PDDC is continuing to provide diagnoses through examination of digital photographs, although in 2021 there will be a fee for this service.  As in 2020, digital diagnoses will be included in the Wisconsin Disease Almanac.  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 June 19, 2021 through June 25, 2021.

PLANT/SAMPLE TYPE	DISEASE/DISORDER	PATHOGEN	COUNTY
FRUIT CROPS
Apple	Water Core (Suspected)	None	Nemaha (KS)
Blueberry	Cytospora Canker Gloeosporium Canker Phomopsis Canker	Cytospora sp. Gloeosporium sp. Phomopsis sp.	Jackson Jackson Jackson
Grape	Anthracnose	Sphaceloma ampelinum	Dane
Pineberry	Common Leaf Spot Heat Stress (Suspected)	Mycosphaerella fragariae None	Jefferson Jefferson
Plum	Black Knot	Apiosporina morbosa	Dane
Prunus (Unspecified)	Black Knot	Apiosporina morbosa	Rock
Strawberry	Common Leaf Spot Gray Mold Leaf Blight Heat Stress (Suspected)	Mycosphaerella fragariae Botrytis cinerea None	Jefferson Jefferson

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 Anthracnose, Apples, black knot, Blueberries, common leaf spot, cytospora canker, disease, gloesporium canker, Grapes, gray mold leaf blight, heat stress, PDDC, phomopsis canker, Pineberry, Plant Disease Diagnostic Clinic, Plum, prunus, Strawberries, water core.