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Navel orangeworm egg and newly hatched larva.

Manage Navel Orangeworm—Bloom to Postbloom

These activities are critical during the bloom to postbloom period for navel orangeworm management:

  • Remove mummies from trees by February 1.
  • Disk or flail by March 15 to destroy mummies and the navel orangeworm larvae within them.
  • Hang egg traps during the first week of April to track navel orangeworm development throughout the season and to determine a biofix date to start accumulating degree-days.

Important links

Statewide IPM Program, Agriculture and Natural Resources, University of California
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