Year-Round IPM Program Pages
This year-round program covers the major pests of apricot in California.
Fruit development (petal fall to harvest)
- Special issues of concern related to water quality: pesticide and fertilizer applications, drift, runoff due to irrigation or rain. Air quality: volatile organic compounds (VOCs).
- Mitigate pesticide effects to minimize air and water contamination.
What should you be doing during this time?
Monitor for peach twig borer.
- Examine fruit for peach twig borer feeding.
- Continue checking pheromone traps and keep records.
Look for mealy plum aphids. Manage as needed according to the Apricot Pest Management Guideline.
During early fruit set, set out pheromone traps for obliquebanded leafroller.
- Check traps and keep records on a degree-day monitoring form.
In areas with a history of obliquebanded leafroller damage, set out pheromone traps during early fruit set.
- Check traps and keep records .
Apply fungicide treatment for powdery mildew as needed according to the Pest Management Guideline.
Assess weeds in late spring to identify perennials and any species that escaped earlier management efforts.
- Survey weeds and record on a weed survey form . Apply postemergence herbicides, mow, or cultivate as required.
- Refer to herbicide labels for the appropriate preharvest interval (PHI)
Look for:
- pocket gopher mounds
- bird damage to ripening fruit
Manage according to the Pest Management Guidelines.
Watch for signs of disease:
- Bacterial canker
- Eutypa dieback
- Phytophthora root and crown rot
- Ripe fruit rot (Monilinia spp.)
- Shot hole disease
Manage according to the Pest Management Guideline.
Watch for invertebrate pests and manage according to the Pest Management Guidelines:
- Cankerworms
- Earwigs
- European fruit lecanium
- Fruittree leafroller
- Green fruitworm
- Katydid (from Madera south)
- Obliquebanded leafroller
- Orange tortrix (Central Coast)
- Redhumped caterpillar
- Tussock moth larvae