Pollen traps that remove pollen loads from returning forager bees changed foraging patterns for hives in almond and prune orchards. Hives with traps had greater numbers of pollen foragers and higher proportions of foraging bees with pollen loads-than hives without traps. This effect was greatest before ca. 3:00 p.m. Hives with traps had less increase in capped brood and in the adult population than did hives without traps at the end of a 48-day period.