1a. Objectives (from AD-416)
To validate and demonstrate areawide management approaches, primarily mating disruption, for the control of navel orangeworm in walnuts grown in the northern region of California’s central valley.
1b. Approach (from AD-416)
Management of navel orangeworm in walnuts is predicated on effective suppression of codling moth because this insect provides an opening for early season entry of navel orangeworm. A large-scale effort to use codling moth pheromone to disrupt mating will provide the basis for an indirect non-insecticide management option for navel orangeworm control. Additionally, smaller sub-plots will be treated with a pheromone mating disruption program directly targeting navel orangeworm. As part of this project, movement of navel orangeworm among the different host crops in the Sacramento Valley/north region (primarily walnut and almond) will be assessed in order to determine the parameters that determine success for mating disruption targeting navel orangeworm in walnuts. Part of this research will be conducted in collaboration with Carolyn Pickel, another participant in this areawide project. Documents SCA with UC Berkeley.
3. Progress Report
One ARS entomologist based in Parlier, CA, one entomologist at UC Davis and one UCCE economist at Davis, CA, are collaborating with the Almond Board of California to assess the effects of proposed changes to current navel orangeworm management practices in almonds, and associated costs. The outcome will be a variety of control methodologies that will be tied to the current value of almonds and the geographic location of the orchard. A meeting was held in May with a representative of the Almond Board of California at UC Davis to establish the parameters to be used in the economic model and identify information that be needed from the almond industry. Cooperator activity was monitored by reports at a stakeholder meeting,presentations made to the Almond Board of California, telephone conversations and e-mail.