I caught a 5lb'er yesterday in the parking lot on the bottom of a buggy at our local SavaLot downtown. It barely makes up for the lack of swarms, but it was good to catch.
When I picked it up that evening after they all came into the hive I set up there I was in a hurry so I used a boardman feeder with 1 to 1 sugar water. The jar has much black mold inside it. Is this harmful to the bees?