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Navel Orangeworm

Navel orangeworm (NOW) is the primary insect pest of almonds in California. It poses a high risk to an almond crop because the worms bore into the nut and feed on the nutmeat. Not only is the nut damaged, but the feeding opens the door to Aspergillus molds, which can produce aflatoxins, a food safety contaminant.

Minimizing Navel Orangeworm Damage.

Growers should follow a four step IPM program to minimize navel orangeworm damage and risk of aflatoxin:

  • Winter sanitation to remove and destroy mummy nuts

  • Use of mating disruption

  • Monitoring of NOW populations and timing of adult NOW moth flights to time use of insecticides or biological control agents

  • Prompt harvest before a third generation of NOW develops

Do the Mummy Shake! 

To help remind growers to reduce NOW populations (first principle of IPM) by removing their overwintering habitat -  mummy nuts -  the Almond Board of California (ABC) created a parody song. It’s The Mummy Shake — listen now (lyrics here)!

The Mummy Shake

ABC's annual Mummy Shake Video Contest encourages California almond industry members to grab their family, get in the orchard and dance - and, if desired, sing - along to The Mummy Shake parody song. Be sure to capture your best version of The Mummy Shake on video for a chance to win a $500 Amazon gift card.

So what are you waiting for? Don your favorite Halloween costumes and break out your best moves! Learn more about the contest and how to enter at


Navel Orangeworm (NOW) Summit.

In June 2019, the Almond Board of California, in collaboration with the Pistachio and Walnut Research Boards, hosted the first joint Navel Orangeworm (NOW) Summit. The event provided growers, processors, shippers and government agencies an opportunity to discuss the continued economic impact of Navel Orangeworm (NOW) on almond, pistachio and walnut production and marketing. Solutions to NOW pest management were discussed and on-site vendors proved additional information about their management products.

Session One: How Much Does NOW Damage Cost?
Session Two: Join the Less Than 1% (Damage) Club!
Session Three: Won’t you be my Neighbor?
Session Four: What do we do Next?

In addition to navel orangeworm, almonds are subject to an array of insect and mite pests, including peach twig borer, San Jose scale and web-spinning mites. Information on these pests may be found on the UC IPM website: click on ‘Agricultural Pests,’ then ‘Almonds.’