Agriculture: Prune Pest Management Guidelines

Fruit Development

This year-round IPM program covers the major pests of prune in California.

Fruit development (petal fall to harvest)

What should you be doing during this time?

Manage weeds.

  • Treat with postemergence herbicides, mow or cultivate as required.

Monitor San Jose scale:

  • Continue checking pheromone traps.
  • Keep records on a degree-day monitoring form.
  • Treat if needed according to the prune Pest Management Guidelines.

Monitor obliquebanded leafroller:

Monitor peach twig borer if crop is fresh market and no dormant or bloom spray was applied:

Monitor aphids from petal fall until July 15, or until a treatment is applied.

  • Keep records on a degree-day monitoring form.
  • Treat if needed according to the prune Pest Management Guidelines.

Monitor webspinning spider mites weekly using a 5-minute search, starting June 1.

  • Keep records on a monitoring form.
  • Treat if needed according to the prune Pest Management Guidelines.

Monitor rust and treat if needed according to the prune Pest Management Guidelines.

Monitor Cytospora canker.

  • Remove (cut out) cankers.
  • Destroy dead or damaged wood.

Take a fruit damage sample just before harvest. Record the results on a monitoring form to assess the effectiveness of current year's IPM program.

Keep a record of other pests you may see. Treat if needed according to the prune Pest Management Guidelines.

Text Updated: 02/25
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