Course Summary

Gain a comprehensive yet succinct overview of fungicide resistance, covering a range of topics:

• The history of fungicide resistance development
• Resistance mechanisms
• Genetics of resistance
• Risk factors for resistance development

Experts investigating fungicide resistance in row crops, fruits and nuts, and vegetable crops will discuss their latest findings, as well as case studies in different cropping systems.

The course will also discuss measures that FRAC (Fungicide Resistance Action Committee) recommends for mitigating resistance development, and will touch on the research of human pathogen resistance to agricultural fungicides.

Who Should Take this Course?

This course is perfect for:

• Early-career professionals looking to build a strong foundation in fungicide resistance
• Researchers and students interested in both academic and applied perspectives
• Industry members seeking practical insights into managing fungicide resistance
• Educators wanting to stay current with cutting-edge research and applications​
  
• Anyone in the APS community aiming to deepen their understanding of this critical topic
  

​Learning Objectives

At the end of this course participants should be able to:

• Define fungicide resistance and describe different resistance mechanisms
• Explain the development of resistance scales and the variations among them
• Explain how laboratory-detected resistance translates to field-level disease control
• Explain the genetic basis of resistance
• Define and discuss cross-resistance
• Identify risk factors for fungicide resistance development
• Discuss fungicide resistance issues in different cropping systems (row crops, fruits and nuts, vegetables)
• Explain FRAC recommendations for mitigating fungicide resistance development

Tuition

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• Course Outline & Schedule
  

  Module 1: Introduction to Fungicide Resistance and a Deeper Dive into the Genetics of Resistance

  Instructors:

  • Scott Cosseboom, Cornell University
  • Gerd Stammler

  
  

  Learning Objectives:

  • How do we define pathogen resistance to fungicides?
    • History of fungicide resistance development
    • Site-specific and multi-site pesticides
    • Introduction to resistance mechanisms
  • Genetics of Resistance
    • What makes some pathogens more prone to resistance?
    • What is cross-resistance?
    • Why does cross-resistance happen in some pathogens but not others?

  
  
  

  Module 2: Fungicide Resistance in the Lab vs. the Field

  Instructors:

  • Tim Miles, Michigan State University
    
  • Mitch Bauske, Bayer Crop Science

  
  

  Learning Objectives:

  • How do we determine pathogen resistance in the lab?
  • How are resistance scales determined?
    • Previous publication(s)
    • Based on what are scales chosen if there are multiple? Are they “universal” from lab to lab? (Or do different labs use different scales?)
    • For generalist pathogens, do the scales differ between crops and how?
  • How does resistance in the lab translate to what’s seen in the field?

  
  
  

  Module 3: Risk Factors Driving Fungicide Resistance and Insights from a Case Study on Potato

  Instructors:

  • Nikita Gambhir, FMC Stine Research Center
  • Amanda Gevens, University of Wisconsin-Madison

  
  

  Learning Objectives:

  • Risk factors driving fungicide resistance: How do you determine which crops/pathogens/fungicides are most prone to resistance?
  • Case Study: Potato Late Blight and Mefenoxam

  
  
  

  Module 4: Case Studies – Fungicide Resistance in Row Crops

  Instructors:

  • Martin Chilvers, Michigan State University
  • Carl Bradley, University of Kentucky

  
  

  Module Content:

  • TBD

  
  
  

  Module 5: Case Studies – Fungicide Resistance in Vegetables & Peach

  Instructors:

  • Lina Quesada, North Carolina State University
  • Guido Schnabel, Clemson University

  
  

  Module Content:

  • Case Study: Vegetables
  • Case Study: Peach

  
  
  

  Module 6: Case Studies – Fungicide Resistance in Apples & Tree Nuts

  Instructors:

  • Achour Amiri, Washington State University
  • Paulo Lichtemberg, Bayer Crop Science

  
  

  Module Content:

  • Case Study: Apples for Postharvest/Thiabendazole
  • Case Study: Tree Nuts

  
  
  

  Module 7: Additional Insights: FRAC, One Health, and Key Takeaways in Fungicide Resistance

  Instructors:

  • Andreas Mehl, Bayer AG - Crop Science Division
  • Andrea Ficke, NIBIO Plant Health

  
  

  Module Content:

  • Global FRAC
  • Agricultural Fungicides and Resistance in Medical Antifungals
  • Compare and Contrast Fungicide Resistance Monitoring in Plant Pathogens and Human Fungal Pathogens
  • One Health