Here is some info on Mason Bees (Blue Orchard Bees)
Below are links that are helpful.
www.CrownBees.com
All Sorts of info about Mason Bees!
Bee Diverse Mason bee houses, orchard mason bee and blue orchard bee.
Pollinating Insect-Biology, Management, Systematics Research : Build a Nesting Block
Agricultural bee-nesting tubes
Knox Cellars Native Pollinators
Bees 2000-2001
Suppliers of Pollen Bees
Pollinator Paradise
Management of Hornfaced Bees for Orchard Pollination
Solitary Bees: An Addition to Honey Bees
The hornfaced bee, Osmia cornifrons, and the blue orchard bee, or orchard mason bee, Osmia lignaria, are pollinators of fruit trees. This site gives information on rearing bees, bee supplies, pollination, and other sites of interest.
Product Descriptions
Mites on Mason Bees
Popular article about Krombein's Hairy-Footed Mite, a pest of the Orchard Mason Bee, and its control in the Seattle, Washington area.
Non-Apis Bee Vendors
Insect Note 109
Entomo-Logic Home