Pheromone traps are used to monitor the flights of certain pest moths and San Jose scale. In almond orchards, use pheromone traps to monitor San Jose scale and flights of peach twig borer.
Information obtained from trap catches can be used 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.
Monitoring until biofix is essential. Continuing to monitor after biofix will give you more information about the development of San Jose scale and peach twig borer in your orchard.
General guidelines for using pheromone traps:
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