Thanks for your fast replies, Dawn and Dee,
I was just curious about the development and I thought there might be some standards like “1 drawn frame counts whatsoever amount of bees in Langstroth size”.
And yes - it’s a small folk. There are not more than five frames fully drawn. I started late in the year and that s why I’m little worried if they are big enough to survive the winter. But fortunaltely winter are neither strong nor long in my area. I fed them well and they take the food quite fast ( about 1 kg per week). Give them sugar syrup and a suger/pollen paste extra.
I don’t have a nuc box till now, but I will narrow the space when I see that they are not growing any more. In the moment I have the impression they do still grow.
I know about that powder sugar rolling method - and I’m already looking for the equipment to do it. Seems to be one of the most accurate methods. Beekeeping scientists here just recommend the card diagnose anyway as an easy method to get an overview. It is said that there is a relationship between the natural death fall of mites and the total amount of mites in the hive - depending on the time of the year. Doesn’t disturb the bees at all.