anyone tried this?
http://colonialbeekeepers.com/index.php?option=com_content&view=article&id=98:how-to-make-a-robbing-screen&catid=24:education-information&Itemid=43 (http://colonialbeekeepers.com/index.php?option=com_content&view=article&id=98:how-to-make-a-robbing-screen&catid=24:education-information&Itemid=43)
Let us know how they work out for you? My thinking is that it is to easy to just enter on the ends, but you never know till they're installed.
Quite a bit of the text in the linked powerpoint look to be cut and pasted from my web site... words I wrote 7 years ago...
http://www.bushfarms.com/beesrobbing.htm (http://www.bushfarms.com/beesrobbing.htm)
I think anything that blocks the direct path into the entrance confuses robbers. It should probably work ok if it extends past on the ends...