Navel Orangeworm (NOW) Control in Nut Crops [2026]
OVERVIEW
Navel orangeworm (NOW), Amyelois transitella, first appeared in California in the early half of the 20th century and rapidly increased. Currently, navel orangeworm is the primary pest of almonds, pistachios and walnuts, and also present in citrus, stone fruit, pome, date, and fig crops, impacting the dynamics of the pest in California as hosts for the pest. This course discusses the threat of navel orangeworm in nut crops, as well as best management practices for treatment.
This course is accredited for the following licensing categories: PCAs, Qualified Applicators, Private Applicators, Aerial Applicators, and County Permit Holders.
Course Features
- Lectures 10
- Questions 20
- Duration 1 h (approx)
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COURSE OUTLINE
CREDIT INFORMATION
This course is accredited for CE units/hours by:
- Arizona Department of Agriculture (1 hour) (Not accredited for PMD licenses)
- California Department of Pesticide Regulation (1 hour Other)
- Certified Crop Adviser (1 CEU Integrated Pest Management)
- Florida Department of Agriculture (1 CEU General Standards/Core)
- New Mexico Department of Agriculture (1 Credit: General, PRAP)
- Texas Department of Agriculture (1 CEU, General)
CONTRIBUTORS
Acknowledgements
Farm Progress acknowledges and thanks the following for their contribution to this course:
Thanks to Todd Fitchette, Associate Editor, Western Farm Press — Farm Progress, for his contribution to the Good Neighbor section.
Thank you to Emily J. Symmes, PhD, Area IPM Advisor, Associate Director for Agriculture, UC Statewide IPM Program
and Greg Montez, PCA.
Unless otherwise noted, all photos are copyrighted by the Regents of the University of California.
https://www2.ipm.ucanr.edu/agriculture/pistachio/navel-orangeworm/
https://www2.ipm.ucanr.edu/agriculture/almond/Navel-Orangeworm/
https://www.almonds.com/pests/navel-orangeworm
https://www.farmprogress.com/tree-nuts/almonds-enter-critical-period-now-control
https://www2.ipm.ucanr.edu/agriculture/walnut/Navel-Orangeworm/
https://www2.ipm.ucanr.edu/agriculture/walnut/Using-Ethephon/
https://www2.ipm.ucanr.edu/agriculture/fig/Navel-Orangeworm/
http://ipm.ucanr.edu/calludt.cgi/DDMODEL?MODEL=NOW&CROP=almonds
https://www.youtube.com/watch?v=RNYevBVIhYQ
https://www3.epa.gov/pesticides/chem_search/reg_actions/reregistration/fs_PC-099801_1-Apr-95.pdf
https://www.farmprogress.com/tree-nuts/navel-orangeworm-control-requires-systems-approach
https://www.wcngg.com/2019/03/05/update-on-sterile-insect-program-for-control-of-navel-orangeworm/
https://www.almonds.com/processors/processing-safe-product/alfatoxin
https://www.farmprogress.com/tree-nuts/white-house-expands-now-research-project
https://www.farmprogress.com/tree-nuts/mating-disruption-shows-promise-now-control
http://thealmonddoctor.com/2012/11/30/winter-sanitation/
Sponsor Information
Effective navel orangeworm control requires a program approach, built on multiple tools working together throughout the season. FMC is proud to offer Avaunt® eVo insect control and Altacor® eVo insect control. These two products are designed to perform in the most critical in-season management windows, helping close the lapse in control gaps that navel orangeworm is known to exploit. For more information, visit ShieldYourYield.com.

