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

Required Participation

To earn a completion badge, participants will need to:

1. Attend the weekly live session or view the session on-demand.
2. Successfully complete the quiz associated with each module.

Tuition

*Thank you to our generous sponsors, a select number of student registrants will be eligible for free registration. Once the funds have been exhausted, this opportunity will be removed from registration. Please reach out to APS staff for any questions.

Thank You Sponsors!

• ​Course Outline & Schedule​​
  

  Course Outline & Schedule

  Live Sessions take place 11 a.m. – 12:00 p.m. US Central Time​

  *Denotes a requirement for course completion. Either Live Session or Recorded Session must be completed, not both.

  1. Course Welcome (How to use the Learning System)

     1. Course Navigation & Completion Requirements
     2. Getting Help
     3. Course Syllabus

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

     1. Instructors:
        • Scott Cosseboom, Cornell University
        • Gerd Stammler
     2. Live Session: September 3*
     3. Supplemental Materials: Slide deck pdf., additional as needed
     4. Recorded Session: On-Demand Viewing*
     5. Knowledge Check/Module Quiz*
     6. Content:
        1. How do we define pathogen resistance to fungicides?
           1. History of fungicide resistance development
           2. Site-specific and multi-site pesticides
           3. Introduction to resistance mechanisms
        2. Genetics of Resistance
        1. What makes some pathogens more prone to resistance?
        2. What is cross-resistance?
        3. Why does cross-resistance happen in some pathogens but not others?

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

     1. Instructors:
        • Tim Miles, Michigan State University
        • Mitch Bauske, Bayer Crop Science
     2. Live Session: September 17*
     3. Supplemental Materials: Slide deck pdf., additional as needed
     4. Recorded Session: On-Demand Viewing*
     5. Knowledge Check/Module Quiz*
     6. Content:
        1. How do we determine pathogen resistance in the lab?
        2. How are resistance scales determined?
           1. Previous publication(s)
           2. Based on what are scales chosen if there are multiple? Are they “universal” from lab to lab? (Or do different labs use different scales?)
           3. For generalist pathogens, do the scales differ between crops and how?
        3. How does resistance in the lab translate to what’s seen in the field?

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

     1. Instructors:
        • Nikita Gambhir, FMC Stine Research Center
        • Amanda Gevens, University of Wisconsin-Madison
     2. Live Session: October 1*
     3. Supplemental Materials: Slide deck pdf., additional as needed
     4. Recorded Session: On-Demand Viewing*
     5. Knowledge Check/Module Quiz*
     6. Content:
        1. Risk factors driving fungicide resistance: How do you determine which crops/pathogens/fungicides are most prone to resistance?
        2. Case Study: Potato Late Blight and ​Mefenoxam

  5. Module 4: Case Studies – Fungicide Resistance in Row Crops

     1. Instructors:
        • Martin Chilvers, Michigan State University
        • Carl Bradley, University of Kentucky
     2. Live Session: October 15*
     3. Supplemental Materials: Slide deck pdf., additional as needed
     4. Recorded Session: On-Demand Viewing*
     5. Knowledge Check/Module Quiz
     6. Content
        1. Case Studies TBD

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

     1. Instructors:
        • Lina Quesada, North Carolina State University
        • Guido Schnabel, Clemson University
     2. Live Session: October 22*
     3. Supplemental Materials: Slide deck pdf., additional as needed
     4. Recorded Session: On-Demand Viewing*
     5. Knowledge Check/Module Quiz*
     6. Content:
        1. Case Study: Vegetables
        2. Case Study: Peach

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

     1. Instructors:
        • Achour Amiri, Washington State University
        • Paulo Lichtemberg, Bayer Crop Science
     2. Live Session: November 5*
     3. Supplemental Materials: Slide deck pdf., additional as needed
     4. Recorded Session: On-Demand Viewing*
     5. Knowledge Check/Module Quiz*
     6. Content:
        1. Case Study: Apples for Postharvest/Thiabendazole
        2. Case Study: Tree Nuts

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

     1. Instructors:
        • Andreas Mehl, Bayer AG - Crop Science Division
        • Andrea Ficke, NIBIO Plant Health
     2. Live Session: November 19*
     3. Supplemental Materials: Slide deck pdf., additional as needed
     4. Recorded Session: On-Demand Viewing*
     5. Knowledge Check/Module Quiz*
     6. Content:
        1. Global FRAC
        2. ​Agricultural Fungicides and Resistance in Medical Antifungals
        3. Compare and Contrast Fungicide Resistance Monitoring in Plant Pathogens and Human Fungal Pathogens
        4. One Health
        5. Webinar Wrap-Up