Year-Round IPM Program Pages
This year-round IPM program covers the major pests of prune in California.
Fruit development (petal fall to harvest)
- Why is this season important in an IPM program?
- Special issues of concern related to water quality: runoff from irrigation, and drift.
What should you be doing during this time?
Survey weeds in late spring.
- Mow or cultivate as required.
- Keep records on a late-spring weed survey form .
- Continue checking pheromone traps.
- Keep records on a degree-day monitoring form .
- Treat if needed according to Prune Pest Management Guideline.
Monitor obliquebanded leafroller:
- Put up pheromone traps by April 15.
- Keep records on a degree-day monitoring form .
Monitor peach twig borer if crop is fresh market and no dormant or bloom spray was applied:
- Check pheromone traps.
- Keep records on a degree-day monitoring form .
- Accumulate degree-days
to monitor fruit:
- Keep records on a monitoring form .
- Treat if needed according to Prune Pest Management Guideline.
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 Prune Pest Management Guideline.
Monitor webspinning spider mites weekly using a 5-minute search, starting June 1.
- Keep records on a monitoring form .
- Treat if needed according to Prune Pest Management Guideline.
Monitor rust and treat if needed according to Prune Pest Management Guideline.
- 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 records of other pests you may see. Treat if needed according to Prune Pest Management Guideline.