Osmia ribifloris

Cockerell, 1900

blueberry bee, blueberry mason bee

Species Guides

2

Osmia ribifloris, commonly known as the blueberry or blueberry , is a solitary megachilid bee native to western North America. It specializes in gathering pollen from plants in the Ericaceae, particularly manzanita (Arctostaphylos spp.) and Oregon grape in wild settings. The has been developed as a commercially managed for highbush blueberry production, with documented rearing programs spanning 14 years in the southeastern United States.

Osmia ribifloris ribifloris by (c) Annika Lindqvist, some rights reserved (CC BY), uploaded by Annika Lindqvist. Used under a CC-BY license.Osmia ribifloris by (c) Victor Engel, some rights reserved (CC BY), uploaded by Victor Engel. Used under a CC-BY license.Osmia (Melanosmia) ribifloris by the Smithsonian. Used under a CC0 license.

Pronunciation

How to pronounce Osmia ribifloris: /ˈɒzmɪə ˌraɪbɪˈflɔːrɪs/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

No specific diagnostic features distinguishing O. ribifloris from are documented in available sources. As with other Osmia , identification likely requires examination of morphological characters such as facial structures, punctation patterns, and genitalia, but specific comparative guidance is not provided.

Images

Habitat

Native range encompasses montane and coastal regions of western North America. In managed settings, inhabits artificial nesting materials provided on blueberry farms. Has been successfully reared in the Deep South (Alabama and Mississippi) outside its native range for commercial pollination purposes.

Distribution

to western North America: Oregon, California, Nevada, Utah, Arizona, New Mexico, Texas, and northern Mexico. Native occur west of the Mississippi River. Introduced to southeastern United States through commercial rearing programs.

Diet

Gathers pollen primarily from Ericaceae. Preferred wild include manzanita (Arctostaphylos spp.) and Oregon grape (Mahonia/Berberis spp.). Will utilize blueberry (Vaccinium spp.) as a pollen source, enabling its use as a commercial .

Host Associations

  • manzanita - preferred pollen Arctostaphylos spp.
  • Oregon grape - preferred pollen Mahonia/Berberis spp.
  • rabbiteye blueberry - managed pollination Vaccinium virgatum
  • southern highbush blueberry - managed pollination Vaccinium hybrid complex

Life Cycle

Solitary with . Females construct nests in pre-existing cavities, provisioning with pollen cakes and laying individual . Larvae develop through summer and autumn, pupate, and overwinter as in cocoons. timing appears flexible; reproductively viable adults can be delivered as cocoons for field- release in managed systems. Males emerge before females (protandry), as observed in .

Behavior

Nests in artificial nesting materials including cardboard tubes and drilled wooden blocks. Females enter galleries headfirst, reverse orientation to deposit abdominal pollen onto provision masses. Nest are sealed with mud partitions. In managed , surplus cocoons and nesting supplies represent potential secondary revenue for growers.

Ecological Role

of Ericaceae in native range. Effective pollinator of commercial blueberry cultivars, with documented in both rabbiteye and southern highbush blueberry systems. Contributes to reproductive success of early-spring flowering shrubs in montane and chaparral .

Human Relevance

Developed as a commercially managed orchard for blueberry pollination. Used as an alternative or supplement to pollination in highbush blueberry production. Commercial rearing programs have operated for over 14 years in the southeastern United States. Potential for growers to generate secondary income through sale of surplus bees and nesting materials.

Similar Taxa

  • Osmia lignariaBoth are commercially managed orchard bees used for fruit pollination; O. lignaria is native to North America and used for almond and stone fruit pollination, while O. ribifloris is specifically developed for blueberry pollination and has a more restricted western native range.
  • Osmia cornifronsBoth are managed solitary bees used in orchard pollination; O. cornifrons is native to Asia and was intentionally introduced to the U.S. in 1978, whereas O. ribifloris is native to western North America.

More Details

Commercial rearing history

Documented rearing programs spanning 14 years in Alabama and Mississippi have investigated the ecological, physiological, and genetic consequences of maintaining small in prolonged captivity.

Taxonomic note

One of several referred to as 'blueberry '; this is not exclusive to O. ribifloris.

Sources and further reading