Year-Round IPM Program Pages
This year-round IPM program covers the major pests of pistachios in California.
About Dormancy to Delayed-Dormancy
- Why is dormancy to delayed dormancy important in an IPM program?
- Special issues of concern related to environmental quality: runoff and drift.
- Mitigate pesticide effects to minimize air and water contamination
What should you be doing at this time?
Carry out dormant season sanitation activities:
- Prune trees. While pruning look for, and keep records of, Botryosphaeria cankers for management decisions later in the season:
- Remove and destroy, or disc under, mummy nuts to reduce navel orangeworm overwintering sites and inoculum sources of Botryosphaeria panicle and shoot blight. At a minimum, shake trees and remove mummy nuts from the berms.
- Destroy, or remove from the orchard floor, pruned wood and brush piles, to reduce overwintering sites for leaffooted plant bug and the incidence of Botrytis blossom and shoot blight and Botryosphaeria panicle and shoot blight.
- Keep records of weeds identified in the orchard, noting locations of problematic weeds.
- If using herbicides, before application:
- Create a custom herbicide chart for winter weeds in your field.
- Mechanically remove leaves and debris from the treatment area.
- Use drift-reducing spray nozzles where possible, and apply herbicides only when environmental conditions are favorable.
- Scout the field following treatment and control escaped weeds.
In early- to mid-January, examine one-year-old fruiting wood for live and parasitized soft scales, paying special attention to previously infested areas. Treat if needed in mid-February according to the Pistachio Pest Management Guidelines.
Consider performing a BUDMON test (detects bud colonization and infection) in February to mid-March to predict the risk of Botryosphaeria panicle and shoot blight at harvest.
Look for vertebrates and their damage and manage if needed:
- Ground squirrels
- Meadow voles
- Pocket gophers