Leafcutter Bees

stevin(6)February 4, 2014

Been doing lots of reading on how to build a home for these bees, but majority of the write-ups refer to Mason Bees. The preferred hole size for the Mason Bees is 5/16". Is it the same for the Leafcutter? I've read that the hole should be smaller but a size was never mentioned.

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Konrad___far_north(3..just outside of Edmonton)

As far as I remember 5/16 also, but I would make some with 3/8,..just to see what they prefer,.. have seen natural holes in old trees, ...I don't think size is too critical.

This one is doing spring cleaning, looks like about 3/8" hole or larger.

    Bookmark   February 6, 2014 at 1:31AM
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jean001a(Portland OR 7b)

Leafcutter bees, also called alfalfa bees, nest in 1/4-inch diameter tubes but will use the same size holes as will masons.

see this
http://snohomish.wsu.edu/garden/masonbees/inse006.htm

Here is a link that might be useful: masons & alfalfa bees

    Bookmark   February 15, 2014 at 11:22PM
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Beeone(4 N. Wyo.)

They seem to prefer a 1/4 inch hole, that is the approximate size of commercial nesting boards used in alfalfa seed production. Leafcutters require approximately 21 days of 80 degrees or better to hatch in the spring, which brings them out in mid to late June after fruit trees have bloomed and they really aren't active until the air temperature gets above 70 degrees--making them a summer bee.

    Bookmark   February 22, 2014 at 3:05AM
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stevin(6)

great info! 1/4" - 5/16" holes should keep them happy.
is there a rule of thumb as to how far apart these holes should be? with the straws they are no further than an 1/8" apart and with the blocks of wood they appear to be 3/4"-1" apart. does it really matter?

    Bookmark   February 26, 2014 at 4:40PM
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