The method of using pollen traps to provide a protein source that can be supplemented to bee’s feed when raising queens or drones.
This is considered by some to be a “black art” but there are no mysteries here. If we embark on queen rearing there is no point in producing “substandard” queens (and the same applies to drones). By feeding pollen along with honey and syrup we can ensure that full nutrition is available (whether the bees will avail themselves of it depends somewhat on how it is presented within the hive).
Pollen Traps deals with the layout and details of several different types of construction. This page deals with the principles or reasons why it is considered necessary and the way the resulting pollen is delivered to the bees. I will do a blog dedicated to explaining pollen traps in great detail.