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While flying O. lignaria in Utah tart cherries may support sustainable in-field bee propagation, their subsequent impacts on tart cherry yield were not detected when paired with standard stocking densities of honey bees.įruit and nut tree crops comprise an important and critical segment of US agricultural production, which relies heavily, and often exclusively, upon insect pollination to achieve profitable yields. lignaria populations was achieved in 2017 but not 2018, possibly due to unknown changes to orchard management or environmental factors. The lack of differences in yield is likely a consequence of local saturation of pollinator services supplied by managed honey bees throughout experimental orchards, such that no additive benefit of managed O. Osmia lignaria supplementation did not measurably increase cherry fruit set, fruit per limb cross-sectional area or fruit weight. lignaria releases alongside the standard honey bee hive stocking rate of 2.5 hives/ha. Three paired 1.2 ha sites were selected for evaluation of cherry fruit set and yield with and without managed O. lignaria co-pollination with honey bees in central Utah commercial tart cherry orchards during 20 bloom. This study evaluated the implementation of O.
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Osmia lignaria is a commercially available, native solitary bee species recognized for its propensity to forage upon and pollinate tree fruit crops such as apple, almond and cherry.