Plant Disease Diagnostics Clinic Mission

The University of Wisconsin-Madison/Extension Plant Disease Diagnostics Clinic (PDDC) provides assistance in identifying plant diseases and provides educational information on plant diseases and their control.

PDDC clients include agricultural and horticultural producers (e.g., farmers, nursery owners), agricultural and horticultural professionals (e.g., crop consultants, arborists), home gardeners, Extension staff and Master Gardener volunteers, and state and local government (e.g., Wisconsin DNR, city and county foresters).

While the Plant Disease Diagnostics Clinic focuses on plant disease problems in the state of Wisconsin, any interested party is welcome and encouraged to take advantage of and participate in the Clinic’s educational services and activities.

If after exploring this website, you have questions about PDDC services feel free to contact the clinic at 608-262-2863 or

Come Meet the PDDC Director and Get Your Plant Disease Questions Answered in Person

Brian Hudelson, the Director of the PDDC, will appear at the 2017 Garden Expo held at the Alliant Energy Center in Madison WI, Friday February 10th – Sunday February 12th.

Brian will be available at the PDDC booth to answer questions.  You can also pick up color copies of our popular University of Wisconsin Garden Facts fact sheets on a variety of topics.

Booth number:  833-834

Other Appearances:

Day Time Room Presentation Title
Sat. 2/11 9:30am Mendota 4 Garden talk with WPR’s Larry Meiller – Brian will appear with Dane County Extension Horticulture Educator Lisa Johnson
Sat. 2/11 1pm Mendota 5 Diseases of Herbaceous Ornamentals
Sun. 2/12 11:30am Mendota 5 Diseases of Herbaceous Ornamentals




University of Wisconsin-Madison