Year-Round IPM Program Pages
This year-round IPM program covers the major pests of peach in California.
About Bloom (green tip to petal fall)
- Why is this season important in an IPM program?
- Mitigate pesticide effects on air and water quality.
What should you be doing during this time?
- Oriental fruit moth (February 7 in San Joaquin and Sacramento valleys)
- Omnivorous leafroller (San Joaquin Valley—February 20)
- San Jose scale (February 25—San Joaquin and Sacramento valleys)
Check traps and keep records (example monitoring/degree-days form .
If using mating disruption for oriental fruit moth, place dispensers in orchard after first moth is caught.
Examine flower clusters and leaves for:
- Peach twig borer
- Fruittree leafroller
- Obliquebanded leafroller
- Katydids
- Western flower thrips
Monitor for other pests, including:
- Stink bugs
- Plant bugs
- Known invasive pests (spotted wing drosophila, light brown apple moth)
When rainy conditions promote disease, time fungicide treatment according to Peach Pest Management Guidelines:
- Brown rot at 20 to 40% bloom and full bloom.
- Jacket rot treatment at full bloom.
- Powdery mildew treatment at petal fall.
- Scab, if orchard has a history of this disease.
Monitor for diseases:
- Rust
- Monitor twig cankers beginning late March.
- Treat with fungicide if needed according to Peach Pest Management Guidelines.
- Shot
hole
- Fruiting structures in leaf lesions as long as weather is wet.
- Manage if needed according to Peach Pest Management Guidelines.
Observe the orchard for vertebrates and manage as necessary:
If orchard floor vegetation present, manage as needed.
Other pests you may see:
- Armillaria root rot (oak root fungus)
- Bacterial canker
- Phytophthora crown and root rot