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In the late 1990’s, I (Karen) bought into the idea that doubles were stronger than singles.  I convinced the guys to run half a yard as singles and the other half as doubles for most of the season.  At the time, we estimated the brood area in the hives almost every time that we went into them because so many people were working the hives that we needed a relatively impartial measure to tell us whether the hive was growing or not. 

Consistently, the singles had more brood area than the doubles.  The doubles had so much extra space to store honey in the brood boxes that they didn’t move the honey up above the queen excluders and even restricted how much room the queen had to lay eggs. It was my only and last experience with double brood chamber hives in Saskatchewan. (Not including the baby nuc hives and experimental mating nuc units.) 

After that experiment, I was convinced that singles were at least as strong if not stronger than doubles and that the problem that led people to call a queen excluder a honey excluder wasn’t with the excluder, but rather with the size of the brood nest.

I've seen research comparing singles to doubles before.  My objection to that research has always been that they ignored the basic tenants that are required to run a single and ran them just like they would a double therefore biasing the results in favour of the doubles.

Perhaps we biased the results in favour of the singles because we treated the doubles exactly how we would treat singles.


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