Navel Orangeworm (NOW) Control in Nut Crops [2026]

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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)

  • COURSE OUTLINE

    • Introduction
      1 min.
    • Navel Orangeworm: The Pest and its Damage
      8 min.
    • Navel Orangeworm in Almonds
      11 min.
    • Navel Orangeworm in Pistachios
      5 min.
    • Navel Orangeworm in Walnuts
      5 min.
    • Sustainable Treatment Options
      6 min.
    • Other Management Efforts
      4 min.
    • Aflatoxin
      1 min.
    • Pesticide Safety Review
      8 min.
    • Conclusion and References
      1 min.

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.

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