Plant Disease Diagnostics Clinic

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2023 PDDC Plant Disease Talks
2024 PDDC Monthly Disease Talk Registration Form
2024 PDDC Plant Disease Talks
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2026 PDDC Monthly Disease Talk Registration Form
2026 PDDC Plant Disease Talks
Ask the Experts: A Monthly Q&A Series
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Fact Sheet Listing – Diseases – Broad Leafed Woody Ornamental
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Search for:

Alternaria_Leaf_Blight_216_x_216

July 11, 2014 216 × 216 Alternaria_Leaf_Blight_216_x_216

Alternaria leaf blight lesions on three-year-old ginseng leaves.

Alternaria leaf blight lesions on three-year-old ginseng leaves.

University of Wisconsin-Madison

University of Wisconsin-Madison

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Learn About Us:

Clinic Overview

Diagnostic Services

Get a Diagnosis:

Submit Digital Photograph
Submit Physical Sample

Outreach/
Education

Watch Talks & Workshops:

Ask the Experts Talks
Monthly Plant Disease Talks
Events
Book a Talk for Your Group

Watch Courses:

Fundamentals of Plant Diseases
IPM Scout School – Diseases of Field and Forage Crops

Watch/Listen to Media:

Brian on Wisconsin Public Radio
Brian on Wisconsin Public Television

Read/Listen to Resources:

Limerickettsia Book
Monthly Notes (Blog)
Plant Disease Fact Sheets
Plant Disease Pointers (Blog)
Scientific Publications
Wisconsin Hort Update Archive (Podcast)

Test Your Knowledge:

Disease Quizzes – Earn Medallions

Read Disease Stats:

Wisconsin Disease Almanac

Resources for Kids:

Building Block Plant Diseases

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Links

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University of Wisconsin-Madison

Website feedback, questions or
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hudelson@wisc.edu.

© 2026 Board of Regents of the University of Wisconsin System.

Plant Disease Diagnostic Clinic

1630 Linden Dr. Room 183

Madison, Wisconsin 53706

608-262-2863

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UW-Madison College of Agricultural and Life Sciences
UW-Madison Department of Plant Pathology

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