>Are there any benefits to the bees?

We did a lot of comparisons years back.   We found queens would be laying on 
plastic inserts well before wax foundation and on the black several hours 
(day) before the white.  Although we had a couple of theories as to why the 
preference to the plastic, the colour thing really threw us for a loop. We 
had always thought a queens choice for darker comb was related to pupa 
casings (pheromone, texture or both), indicating the frame had raised young 
before.

If the queen & her court, makes these choices, there must be some benefit to 
her.

Certainly makes seeing eggs on new comb a lot easier for us.

Dave Tharle
T'N'T Apiaries
Ardmore, AB 

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