Agriculture: Plum Pest Management Guidelines

Fruit Development

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

Fruit development (petal fall to harvest)

What should you be doing during this time?

Manage weeds.

Monitor San Jose scale:

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

Monitor omnivorous leafroller:

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

Put up peach twig borer pheromone traps.

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

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

Continue monitoring codling moth if it has been a problem in the past.

Keep a  record of other pests you may see:

  • Caterpillars
  • Borers
  • Katydids
  • Diseases
  • Birds

Treat if needed according to the plum Pest Management Guidelines.

Text Updated: 02/25
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