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How to Manage Pests
UC Pest Management Guidelines
Apricot
Pheromone Traps
(Reviewed 11/07,
updated 11/07)
In this Guideline:
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In apricots, pheromone traps are used to monitor peach twig
borer, peachtree borer, and obliquebanded leafroller. The traps are used to
detect first moth emergence and/or to establish a biofix—an identifiable
point in the life cycle—at which degree-day accumulations are begun or
take a management action. For peachtree borers they are useful in detecting the
presence of adults.
Place traps in each orchard for which you need to make pest
management decisions.
- Traps should be placed in orchards by the dates indicated
in the table below.
- Use at least 2 traps per block.
- Distribute the traps uniformly throughout the orchard and
use the same locations each year.
- Place additional traps in areas where populations are known
to be high.
- Hang traps 6 to 8 feet high, 1 to 3 feet inside the canopy
in the north quadrant of the tree, in the shade, and at least 5 trees in from
the edge of the orchard.
- Check traps twice a week until the biofix is established;
thereafter, check traps weekly.
- Remove trapped insects from the trap bottom after you count
and record the trap catch on a monitoring form .
- Replace trap bottoms monthly or when they become covered
with debris and are no longer effective.
- Follow manufacturer's recommendations for replacing
pheromone dispensers.
- Store pheromone dispenser in a refrigerator or freezer.
| Pest
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Where and when
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Importance
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| Obliquebanded leafroller
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Where a problem—early fruit set
(April 15)
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Detect moth emergence to start degree-day
accumulation.
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| Peach twig borer
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Central Coast and San Joaquin
Valley—March 20
Sacramento Valley—April 1
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Detect moth emergence to start degree-day
accumulation.
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| Peachtree borer
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No later than April (and maintain through
September)
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Detect male presence to time when to
examine trees for feeding activity.
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IMPORTANT LINKS
![[UC Peer Reviewed]](/IMAGES/logo-ucpeerreviewed.jpg)
UC IPM Pest Management Guidelines: Apricot
UC ANR Publication 3433
General Information
W. J. Bentley (Crop Team Leader), UC IPM Program, Kearney Agricultural Research Center, Parlier
J. L. Caprile, UC Cooperative Extension, Contra Costa County
W. W. Coates, UC Cooperative Extension, San Benito County
K. R. Day, UC Cooperative Extension, Tulare County
K. J. Hembree, UC Cooperative Extension, Fresno County
B. A. Holtz, UC Cooperative Extension, Madera County
R. A. Van Steenwyk, Insect Biology, UC Berkeley
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