Utah State University Extension
The most common mason bee in Utah is the blue orchard bee. Blue orchard bees collect pollen from a large variety of flowering plants but prefer fruit trees from the family Rosaceae. Recent concerns about honey bees, coupled with the blue orchard bee’s superior pollination of tree fruits, have increased interest in rearing blue orchard bees.
Pitts-Singer, Theresa, "Blue Orchard Bee (Osmia lignaria): Commercial Pollinator for Orchards" (2021). All Current Publications. Paper 2176.