Agriculture: Citrus Pest Management Guidelines

Bloom

This year-round IPM program covers major pests of citrus grown in California's Central Valley.

About Bloom (April)

  • Special issues of concern related to environmental quality: Drift, runoff, and volatile organic compounds (VOCs).

What should you be doing during this time?

Look for Asian citrus psyllids on new flush and by using sweep or tap sampling. Manage according to the Pest Management Guidelines.

Monitor California red scale males (March through October) plus additional methods (e.g. calculate degree days, monitor crawler tapes, and examine harvested fruit).

Look for spider mites and other mites.

Manage if needed according to the Pest Management Guidelines.

Look for cottony cushion scale and predatory vedalia beetles. Collect and relocate vedalia beetles to cottony cushion scale-infested orchards if beetles have not arrived on their own during April.

Look for other pests and their damage to fruit or damage to leaves and twigs, especially:

Manage if needed according to the Pest Management Guidelines.

Look for brown garden snail. Collect and relocate predatory decollate snails if

  • they were not previously found in the orchard
  • brown garden snail has been a problem, and
  • decollate introductions are permitted in your county.

Manage if needed according to the Pest Management Guidelines.

Use pesticides according to their labels to avoid killing honey bees.

Look for diseases that cause symptoms on fruit, leaves and twigs, and on limbs, trunks, and roots, especially:

Record the date and location of problem trees or sites. Manage if needed according to the Pest Management Guidelines.

Provide proper cultural care and good growing conditions to improve tree health and fruit yield, including:

  • Fertilize if needed.
  • Irrigate and adjust scheduling to meet trees’ varying water needs.
  • Prune if needed and skirt-prune lower branches to reduce brown rot.

Harvest mature fruit in coordination with other management activities to ensure good postharvest fruit quality and food safety.

  • Educate and supervise workers regarding fruit-handling Best Management Practices (BMPs)
  • Inspect fruit quality before bins are moved from the picking site to identify grove areas where management practices need improvement.
Text Updated: 01/19