UW-Madison/Extension Plant Disease Diagnostic Clinic (PDDC) Update September 2, 2022
In 2022, 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 August 27, 2022 through September 2, 2022.
| PLANT/SAMPLE TYPE | DISEASE/DISORDER | PATHOGEN | COUNTY |
| FRUIT CROPS | |||
| Apple (‘Honeycrisp’) | Cedar-Apple Rust Honeycrisp Chlorosis | Gymnosporangium juniperi-virginanae None | Dane Dane |
| Apple (Unspecified) | Frost Crack Sooty Mold | None Miscellaneous sooty mold fungi | Ozaukee Ozaukee |
| Grape | Phomopsis Canker | Phomopsis sp. | Vernon |
| Pear | Frogeye Leaf Spot | Sphaeropsis sp. | Florence |
| Raspberry | Fire Blight | Erwinia amylovora | Washburn |
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 Ann Joy, Brian Hudelson, cedar-apple rust, disease, Fire Blight, frogeye leaf spot, frost crack, Grapes, honeycrisp leaf chlorosis, PDDC, pear, phomopsis canker, Plant Disease Diagnostic Clinic, Raspberries, Sarah deVeer, Sooty mold, Sue Lueloff.