Project Number: 2034-43000-037-31-R
Project Type: Reimbursable
Start Date: Mar 22, 2013
End Date: May 15, 2014
1) Characterize seasonal abundance of navel orangeworm in southern Central Valley walnuts, and compare these data with codling moth abundance and walnut infestation by these two pests. 2) Estimate the relative contribution of residents and immigrants to navel orangeworm populations in orchards in this region. 3) Examine the impact of mating disruption on reproduction and damage of navel orangeworm in the southern Central Valley.
For objectives 1 & 2, female-baited and oviposition traps will be used to compare abundance of navel orangeworm males and eggs, respectively, between the center and edges of walnut orchards with historically high damage, and also to compare these codling moth and navel orangeworm abundance with infestation by these pests in harvest samples. For objective 3, mating disruption for navel orangeworm will be applied to orchard with historically high damage. Impact of mating disruption will be assessed based on the ability of males to locate live females in traps, oviposition by females, and infestation at harvest by navel orangeworm.