How to Manage Pests
UC Pest Management Guidelines
In this Guideline:
In nectarines, pheromone traps are used to monitor
adult emergence and flights of San Jose scale and certain moths including
oriental fruit moth, omnivorous leafroller, peach twig borer and obliquebanded
the information obtained from trap catches to schedule control actions when
used in conjunction with degree-day calculations. The traps are used to
establish a biofix—an identifiable point in the life cycle of the pest at
which you can begin degree-day accumulation or take a management action. For
example, the biofix for peach twig borer is the date that the first adult moth
of each generation is caught.
GUIDELINES FOR USING PHEROMONE TRAPS
- Place traps in each orchard for which you need to make pest management
Traps should be placed in orchards by the dates indicated in the table
Use at least 2 traps per block for moths, and 3 or 4 per
block for San Jose scale.
Distribute the traps uniformly throughout the orchard and
use the same locations each year.
Place additional traps in hot spots for specific pests.
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 trap catches on a monitoring form .
Replace trap bottoms monthly or when they become covered
Follow manufacturer's recommendations for replacing
Store pheromone dispenser in a refrigerator or freezer.
WHEN TO PUT OUT TRAPS IN THE
SAN JOAQUIN VALLEY
UC IPM Pest Management Guidelines: Nectarine
UC ANR Publication 3451
W. J. Bentley (Crop
Team Leader), UC IPM Program, Kearney Agricultural Center, Parlier
K. R. Day, UC Cooperative Extension, Tulare County
R. A. Duncan, UC Cooperative Extension Stanislaus County
S. Johnson, Pomology, Kearney Agricultural Center, Parlier
J. A. Roncoroni, UC Cooperative Extension, Napa County
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