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["Lon J. Rombough" <lonrom@hevanet.com>]

I don't know about current technology, but the old queen excluders were made of parallel rods  rather than square holes.  On the other hand, the old pollen collectors used hardware cloth to scrape the pollen pellets off the bees' legs.   You might want to check with a company that makes bee supplies on the size of the holes.  Even if the holes allow them to pass, they might discourage the bees from entering if it's too much work.
-Lon Rombough
NEW grape pruning video: http://www.bunchgrapes.com/dvd.html View a short, low resolution clip here: http://www.youtube.com/watch?v=8Q58zFY0B1M
Grapes, writing, consulting, my book, The Grape Grower, at http://www.bunchgrapes.com  Winner of the Garden Writers Association "Best Talent in Writing" award for 2003. 
A video about The Grape Grower : http://cookingupastory.com/index.php/2008/04/18/the-grape-grower/
On Jul 30, 2009, at 8:20 PM, Mark Angermayer wrote:

I appoligize for the off-topic question, but I know there are several on this list who keep honeybees and I have a question.
 
Here's the deal.  I am considering enclosing my blackberry and blueberry planting in hardware cloth.  The purpose of the hardware cloth is two-fold. 
 
1.  To keep the birds out.
 
2.  To keep the Green June beetles out.
 
It's a pretty big area to enclose, but I'm tired of the pest pressure.  However, if possible I'd like to make the hardware cloth big enough to allow the honey bees to pollinate the berries.  I'm thinking the Green June beetles are about the size of a queen bee, so my question is, does anyone know what is the size of the holes of a queen excluder? Do queen excluders have round holes, or are they square?  I'm thinking 3/8" hardware cloth would keep a queen out and let the workers pass through, but I'm not sure.
 
Mark
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