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
2025 PDDC Monthly Disease Talk Registration Form
2025 PDDC Plant Disease Talks
2026 PDDC Monthly Disease Talk Registration Form
2026 PDDC Plant Disease Talks
Ask the Experts: A Monthly Q&A Series
Building Block Plant Diseases
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Fact Sheet Listing – Diseases – Broad Leafed Woody Ornamental
Fact Sheet Listing – Diseases – Field and Forage
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Fact Sheet Listing – Diseases – Herbaceous Ornamental
Fact Sheet Listing – Diseases – Needled Woody Ornamental
Fact Sheet Listing – Diseases – Specialty Crop
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Fundamentals of Plant Diseases – Transcript
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Tuber Sampling for Bacterial Ring Rot Testing
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Search for:

Alfalfa-plants-with-Aphanomyces-Seedling-Blight-Root-Rot

July 6, 2015 273 × 288 Aphanomyces Root Rot of Alfalfa

Alfalfa plants with Aphanomyces Seedling Blight Root Rot

Alfalfa plants with Aphanomyces Seedling Blight Root Rot

University of Wisconsin-Madison

University of Wisconsin-Madison

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Note: The menu links below open content in the same tab. Links in the content area at the right open content in a new tab.

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

Test Your Knowledge:

Disease Quizzes – Earn Medallions

Read Disease Stats:

Wisconsin Disease Almanac

Resources for Kids:

Building Block Plant Diseases

Visit Other Related Websites:

Links

Social Media

(aka “X”)

University of Wisconsin-Madison

Website feedback, questions or
accessibility issues:

Email Brian Hudelson.

© 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

View Hours, Directions, Map

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

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Copyright © 2026 The Board of Regents of the University of Wisconsin System

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