Re: Trouble with my first hive
Kenneth, you may not have done anything wrong. With only one hive you don't have a good reference point.
In my opinion, 15 bars of comb from a new package is a little shy of optimum. If there wasn't adequate incoming nectar to get more built, I would have fed syrup. My TBHs started from packages in March 2012 built 25+ bars over the season, with only about 2 gallons each of syrup at installation.
Aside from the varroa issue brought up above, I would look also at how your hive ventilation works.
My TBH hives are all top entrance following the Michael Bush design. This should eliminate any condensation in the hive issues.
-- Victor Hugo -- "Common sense is in spite of, not the result of, education.”