Editing Queen excluder (section)

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{{Refimprove|date=April 2008}}
{{Original research|date=July 2017}}
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{{Infobox tool
| name           = Queen Excluder
| image          = Beekeeping queen excluder.jpg
| image size     = 250px
| caption        = A queen excluder
| other_name     = 
| classification = Beekeeping
| types          = 
| used_with      = [[Langstroth hive]]
| inventor       = [[Petro Prokopovych]]
| manufacturer   = various
| model          = 
| related        = 
}}

In [[beekeeping]], a '''queen excluder''' is a selective barrier inside the [[beehive]] that allows [[worker bee]]s but not the larger queens and [[drone (bee)|drone]]s to traverse the barrier. The bars have a distance of 4.2 millimeters. The barrier grid was probably invented around 1890. 

The purpose is to prevent the queen from moving from the brood chamber to the honey chamber. There she would lay her eggs between storage cells with honey, so that bee larvae or eggs would get into the honey during centrifuging.

Queen excluders are also used with some queen breeding methods.