The navel orangeworm is a key pest of almonds in California. Multiple logistic regression and multiple regression were used to simultaneously assess the effect of the number of tree mummies, number of ground mummies, harvest date, and previous year damage on current damage in almonds. Separate analyses were conducted for nonpareil and pollinator varieties of almonds. Tree mummies were found to have a greater impact than ground mummies, but ground mummies were more numerous. Fields that experienced high damage the previous year were at greater risk and overall, delays in harvest were associated with increased damage