Most mite control methods focus on chemicals or treatments added to the hive. Drone culling is different. It uses the bees’ own biology against the mites.
Drones (male bees) develop more slowly than worker bees. That longer development time makes drone brood especially attractive to varroa mites. The mites move into drone cells in higher numbers and reproduce more successfully there.
We can take advantage of that.
Drone culling starts with giving your colony a frame of drone foundation. These frames are usually bright green and have larger cell sizes. The queen reads those larger cells as drone cells and lays male eggs there.
Once the frame is in the hive, the bees will draw it out with wax and the queen will fill it with drone brood. She walks across the cells and if it's a standard worker cell (smaller) she drops a female egg (fertilized), if it's a larger cell like we give her with drone brood foundation, she drops a male egg (unfertilized).
Mites pile in.
When the drone cells are capped and getting close to emergence, you remove the frame and place it in a freezer. Freezing kills both the developing drones and the mites inside the cells.
After freezing, you have a couple of options. You can give the frame to your chickens — they love the protein-rich bee grubs — or you can leave it out in the open and let the bees clean it out. Once it’s cleaned, the frame goes right back into the hive to repeat the cycle.
In one move, you’ve removed a large number of mites without using chemicals.
Drone culling is not something you do in winter or during times of scarcity. It’s a spring and early summer strategy, used when colonies are growing fast and producing excess drones anyway. March through May is the typical window.
It’s not a stand-alone solution for severe mite problems, but it can be an effective part of a broader mite management plan. Think of it as a mechanical trap — simple, biological, and low impact.
You’re using the bees’ natural tendencies to interrupt the mite life cycle.
No treatments.
No residue.
Just timing and understanding how drones and mites interact.
Sometimes the smartest tool is the one the bees already gave us.