I am looking to expanding to medicinal hive products with my bees and I am especially focused on propolis. I have seen 'traps' people place on tops of hives, then remove the outer cover, and allow bees to cover the trap, you then remove, freeze and viola! clean propolis! I am wondering if anyone has any feedback on these contraptions?
I was thinking of building my own from a wood frame with screen stapled in. Is there an ideal flow, or tree forage that I should be looking for?