UW-Madison/Extension Plant Disease Diagnostic Clinic (PDDC) Update July 30, 2021
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 July 24, 2021 through July 30, 2021.
PLANT/SAMPLE TYPE | DISEASE/DISORDER | PATHOGEN | COUNTY |
FRUIT CROPS | |||
Apple | Cedar-Apple Rust | Gymnosporangium juniperi-virginianae | La Crosse, Milwaukee |
Apple (‘Honeycrisp’) | Honeycrisp Leaf Chlorosis | None | Dane, Marathon |
Blueberry | Fertility Issues (Suspected) Leaf Spot Phomopsis Canker | None Unspecified leaf spot fungus Phomopsis sp. | Marathon Marathon Juneau |
Grape | Anthracnose | Sphaceloma ampelinum | Dane, Sauk, Wood |
Peach | Bacterial Canker (Suspected) Wood Rot | Pseudomonas syringae Unspecified Wood Rot Fungi | Green Green |
Plum/Apricot | Cytospora Canker | Cytospora sp. | Chisago (MN) |
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, apricot, bacterial canker, Blueberries, cedar-apple rust, cytospora canker, fertility issues, Grapes, Honeycrisp, honeycrisp leaf chlorosis, leaf spot, Peach, phomopsis canker, Plum, wood rot.