This research was conducted to quantify the magnitude and types of damage to pecan nuts occurring in a pest-managed commercial pecan orchard. The separation of harvested nuts by the cleaning process into three sources (blowover, conveyor belt rejects, and marketable nuts) and subsequent evaluation of the nuts for damage, showed high variation in yield and damage from tree to tree, cultivar to cultivar, and year to year. Major types of damage for harvested nuts were: mechanical, black kernels, shrivelled kernels and pecan weevil. By elucidating the magnitude of the various types of damage to the nuts at harvest, pecan producers or researchers can look in retrospect and evaluate the merits or deficiencies of the pecan management program and identify factors causing nut loss for that season and then make improvements in future years.