| Date | Location | Title | Link |
| 1/10/2020 | Springfield, IL | Rusts & Leaf Spots & White Mold, Oh My! Fungal Diseases in Cut Flower Production |
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| 1/17/2020 | Madison, WI | New and Emerging Plant Diseases | |
| 1/25/2020 | Wausau, WI | Top Ten Plant Diseases for 2019 | |
| 1/25/2020 | Wausau, WI | Growing Healthy Plants: Basics in Plant Disease Management | |
| 2/4/2020 | Fitchburg, WI | Plant Disease Diagnostics Clinic: 2019 Highlights | |
| 2/7/2020 | Madison, WI | Confessions of a Black Thumb: Plants that I Have Killed (Or at Least Seriously Maimed) |
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| 2/8/2020 | Madison, WI | Plant Diseases in History | |
| 2/9/2020 | Madison, WI | Orchid Diseases | |
| 2/18/2020 | Green Bay, WI | New and Emerging Tree and Shrub Diseases | |
| 2/20/2020 | Madison, WI | Growing Healthy Plants: Basics in Plant Disease Management | |
| 2/20/2020 | Madison, WI | New and Emerging Plant Diseases | |
| 2/26/2020 | Waukesha, WI | New and Emerging Landscape Plant Diseases | |
| 2/28/2020 | Hales Corners, WI | New and Emerging Landscape Plant Diseases | |
| 2/28/2020 | Sheboygan, WI | New and Emerging Landscape Plant Diseases | |
| 3/7/2020 | Union Grove, WI | Vegetable Diseases | |
| 3/7/2020 | Union Grove, WI | Conifer Diseases | |
| 3/10/2020 | Monroe, WI | Level I Master Gardener Training – Plant Diseases | Online Slides |
| 3/17/2020 | Juneau, WI – via Zoom | Level I Master Gardener Training – Plant Diseases | Online Slides |
| 3/31/2020 | Madison, WI | Diseases of Greenhouse Crops | |
| 4/6/2020 | Mauston, WI – via Zoom | Level I Master Gardener Training – Plant Diseases | Online Slides |
| 4/14/2020 | Western Wisconsin via Zoom | Diseases of Evergreens | |
| 4/15/2020 | Western Wisconsin via Zoom | Diseases of Evergreens | |
| 4/21/2020 | Cedarburg, WI – via Zoom | Level I Master Gardener Training – Plant Diseases | Online Slides |
| 4/23/2020 | via Distance Ed | UW Plant Disease Diagnostics Clinic Summary for 2019 | |
| 4/30/2020 | Portage, WI – via Zoom | Foliar Diseases of Trees and Shrubs | |
| 5/1/2020 | Madison, WI – via Zoom | Fun and Games at the PDDC! | |
| 5/5/2020 | Stevens Point, WI – via Zoom | Level I Master Gardener Training – Plant Diseases | Online Slides |
| 5/6/2020 | Madison, WI – via Zoom | Level I Master Gardener Training – Plant Diseases | Online Slides |
| 5/8/2020 | Statewide, WI – via Zoom | UW-Madison PDDC Update | |
| 5/11/2020 | La Crosse, WI – via Zoom | The Science (and Art) of Plant Disease Diagnosis | |
| 5/14/2020 | West Bend, WI – via Zoom | Growing Healthy Plants: Basics in Plant Disease Management | |
| 5/15/2020 | Statewide, WI – via Zoom | UW-Madison PDDC Update | |
| 5/19/2020 | Madison, WI – via Zoom | Foliar Diseases of Trees and Shrubs | |
| 5/20/2020 | Statewide, WI – via Zoom | Diseases to Watch for in 2020 | |
| 5/21/2020 | Statewide, WI – via Zoom | UW-Madison Diagnostic Services | |
| 5/29/2020 | Statewide, WI – via Zoom | UW-Madison PDDC Update | |
| 6/4/2020 | Elkhorn, WI – via Zoom | Level I Master Gardener Training – Plant Diseases | Online Slides |
| 6/5/2020 | Statewide, WI – via Zoom | UW-Madison PDDC Update | |
| 6/12/2020 | Statewide, WI – via Zoom | UW-Madison PDDC Update | |
| 6/17/2020 | Superior, WI – via Zoom | Pesky Plant Problems for 2020 | |
| 6/19/2020 | Statewide, WI – via Zoom | UW-Madison PDDC Update | |
| 6/26/2020 | Statewide, WI – via Zoom | UW-Madison PDDC Update | |
| 7/10/2020 | Statewide, WI – via Zoom | UW-Madison PDDC Update | |
| 7/17/2020 | Statewide, WI – via Zoom | UW-Madison PDDC Update | |
| 7/24/2020 | Statewide, WI – via Zoom | UW-Madison PDDC Update | |
| 7/31/2020 | Statewide, WI – via Zoom | UW-Madison PDDC Update | |
| 8/7/2020 | Statewide, WI – via Zoom | UW-Madison PDDC Update | |
| 8/14/2020 | Statewide, WI – via Zoom | UW-Madison PDDC Update | |
| 8/21/2020 | Statewide, WI – via Zoom | UW-Madison PDDC Update | |
| 8/28/2020 | Statewide, WI – via Zoom | UW-Madison PDDC Update | |
| 9/2/2020 | Statewide, WI – via Zoom | Growing Healthy Plants: Basics in Plant Disease Management | |
| 9/8/2020 | Oshkosh, WI – via Zoom | Top Ten Plant Diseases of 2020 | |
| 9/11/2020 | Statewide, WI – via Zoom | UW-Madison PDDC Update | |
| 9/18/2020 | Statewide, WI – via Zoom | UW-Madison PDDC Update | |
| 9/28/2020 | Stevens Point, WI – via Zoom | Top Ten Plant Diseases of 2020 | |
| 10/13/2020 | Statewide, WI via Zoom | Woody Ornamental Disease Update | |
| 10/21/2020 | Statewide, WI via Zoom | Writing a Fact Sheet 101 | |
| 10/27/2020 | Madison, WI via Zoom | Growing Healthy Plants: Basics in Plant Disease Management | |
| 11/5/2020 | Stevens Point, WI – via Zoom | Diseases of Field and Forage Crops | |
| 11/18/2020 | Madison, WI – via Zoom | Plant Disease Diagnostics Clinic 2020 Disease Summary | |
| 11/24/2020 | Madison, WI – via Zoom | Tales from the PDDC: Trials and Tribulations from 2020 (and Beyond) |