Agriculture: Grape Pest Management Guidelines

Budbreak

This year-round program section covers the major pests of wine and raisin grapes grown in California. For table grapes, see the TABLE GRAPE YEAR-ROUND IPM PROGRAM.

About Budbreak

What should you be doing during this time?

On a warm day, monitor vines and spurs for:

  • Pseudoccus and vine mealybugs
  • Ants associated with mealybugs and European fruit lecanium scale
  • Orange overwintering spider mites
  • Cutworm
  • Thrips

Keep records (example monitoring form PDF). Treat if needed according to the Pest Management Guidelines.

Check pheromone traps for:

  • Omnivorous leafroller
  • Orange tortrix in coastal areas

Keep records (example monitoring form PDF).

Monitor leaf wetness. Track powdery mildew ascospore release and mildew risk index.

Treat if needed according to the Pest Management Guidelines.

Consider treating for phomopsis cane and leaf spot if rain continues after budbreak.

Remove vines that have spring symptoms of Pierce's disease.

Monitor for sharpshooters:

Check sticky traps for sharpshooters:

  • Glassy-winged sharpshooter

In coastal regions near riparian and landscape areas check traps for:

  • Blue-green sharpshooter

Change traps weekly. Keep records (example monitoring form PDF).

Text Updated: 07/15