Thursday, July 9, 2026
1:00 p.m. to 2:00 p.m. PT
Online Webinar
Understanding and Managing Pesticide Resistance in Diamondback Moth
Diamondback moth (DBM) remains one of the most persistent and economically damaging pests in brassica production. Pesticide resistance to multiple modes of action continues to challenge effective control, making resistance management a top priority for growers and advisors.
Join us for an informative webinar focused on pesticide resistance, the biology of DBM, and emerging tools in cotton pests resistance development to improve long-term control strategies.
Meet the Speakers
Jeana Cadby
Environment and Climate Director
Western Growers
Jeana Cadby, Environment and Climate Director for WesternGrowers, a non-profit agricultural trade association that represents farmersgrowing fresh produce in Arizona, California, Colorado and New Mexico. Ourmembers and their workers provide over half the nation's fresh fruits,vegetables and tree nuts, including nearly half of America's fresh organicproduce.
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About the Webinar
This session will explore the latest in resistance research and life cycle of the diamondback moth, with a focus on resistance development and DBM biology. Understanding these biological drivers is critical for designing effective, sustainable Integrated Pest Management (IPM) programs.
In a second session, we will introduce a novel tool currently being used in Arizona crop production to help prevent pesticide resistance. Learn how the Proactive Resistance Management tool works, its role in resistance management, and what it could mean for future DBM control strategies.
What You’ll Learn:
- Key aspects of DBM biology that drive rapid resistance development
- How pesticide resistance evolves and spreads in DBM populations
- Practical approaches to managing resistance within IPM programs
- Overview of a new resistance-prevention tool used in Arizona crops
- Potential applications of this tool for DBM and brassica production systems
Agenda
30 min — Biology of Diamondback Moth and mechanisms of pesticide resistance
30 min — New resistance-prevention tool in Arizona crops and potential adaptation to DBM
Date: Thursday, July 9, 2026
Time: 1:00 p.m. to 2:00 p.m. PT
Location: Online via Zoom
There will be an opportunity for Q&A.
Meet the Speakers
Dr. Ian Grettenberger
Assistant Specialist in CE Entomology
University of California Davis
Dr. Grettenberger is an Associate Professor of Cooperative Extension at the University of California Davis in the Department of Entomology and Nematology at UC Davis. His lab works on field and vegetable crop integrated pest management. He earned a Ph.D. in entomology from Penn State University and a BS in biology from Western Washington University.
Peter C. Ellsworth
Specialist (Extension) and Professor
University of Arizona
Dr. Peter C. Ellsworth is a Specialist in Cooperative Extension and Professor at the University of Arizona, based at the Maricopa Agricultural Center. His areas of expertise include integrated pest management, applied insect ecology, insect–crop interactions, and resistance management in field crops. Peter leads multidisciplinary efforts to advance IPM research and implementation. He also serves as Arizona’s federal IPM Coordinator and Director of the Arizona Pest Management Center, supporting statewide programs in sustainable pest management. He earned his Ph.D. in entomology from North Carolina State University, an M.S. from the University of Missouri, and a B.S. from the University of New Hampshire.
Stay Connected with the Minds Behind the Science
Our Science Team is always exploring new ways to strengthen food safety, sustainability and crop health. Follow Western Growers Science on LinkedIn for research updates, field insights and a behind-the-scenes look at the work shaping the future of agriculture.
For more information please contact Jeana Cadby at jcadby@wga.com.
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