The Controversial Queen Excluder
Beekeeping is a hobby full of many different kinds of interesting equipment. All pieces of equipment are not used by every beekeeper. Excluders are the subject of controversy among many beekeepers. Should you use a queen excluder on your beehive?
This is a question that many new beekeepers ask themselves. And unfortunately, they get many different opinions.
Again, one of the joys (curses) of beekeeping, lots of opinions. After evaluating the pros and cons of their use, you can decide if you want to include them in your apiary.
Specialized Beekeeping Equipment
A queen excluder is an optional piece of beekeeping equipment. In general, you do not receive this piece of equipment in a beginners beekeeping kit.
Queen excluders are available in different materials. They are commonly made of metal or plastic. Metal ones are sometimes framed with wood.
The purpose of the excluder is to prevent the queen bee from entering honey supers intended for human consumption.
If allowed free range, the queen bee will often move up into the honey supers. Beekeepers striving for honey production do not want her to lay eggs in the honey supers.
The lower boxes of the hive are usually considered the brood chamber. Boxes near the top are for honey storage.
No Brood in Honey Supers Please!
When brood is in the honey supers, it makes harvest difficult for the beekeeper. It is more difficult to remove honey supers containing brood from the colony. They don’t want to abandon their baby bees !
Also, honey frames that have had bee brood in them are more susceptible to bee pests such as wax moths.
Its just good beekeeping to keep the queen bee laying in the brood nest of the hive and not in the honey to be harvested.
Queen Excluder Designs
Plastic queen excluders are the most economical option. They do not last as long as metal because they are prone to breaking. They do the job but personally I don’t prefer plastic.
Metal excluders are the type that are most commonly used. They are placed directly under the boxes of honey you hope to harvest.
What is a Queen Excluder?
Before we rush into the possible pros and cons of using a queen bee excluder, let’s examine the item.
We don’t know the identity of the first beekeeper to come up with the idea of using one. But, a metal queen excluder was made in France sometime in the mid 1800’s.
Perforated zinc sheets with round holes were used. And, beekeepers worried about damage to worker’s bees wings.
Later, stiff wires were introduced to serve as the base of the queen excluder. The proper distance between the wires is 165/1000 of an inch (.165) or 4.2mm.
An excluder used on Langstroth hives is placed between the normal brood nest boxes (1 or 2) and harvest supers.
How Does a Queen Excluder Work?
One on the first things we learn about bees, is that the queen bee is larger than workers. It is easy to notice the long plump abdomen of a queen bee.
But the thorax (mid-section) of a mature queen bee is usually also slightly larger than that of workers.
This difference in thorax size prevents the queen from moving through the queen excluder.
Is a queen excluder 100% foolproof? No. We have to remember that nature loves genetic diversity.
Undersized or unmated queens will sometimes be able to squeeze through the wires.
Also, over time the equipment can become bent or warped reducing the effectiveness. On most occasions though, the queen excluder will keep the queen down below.
Benefits of Using a Queen Excluder
The obvious benefit of using a queen excluder on your hive is keeping brood out of the honey supers.
Why is this a big deal? It makes harvest time much easier and faster. The beekeeper does not have to closely inspect each frame of honey.
We can harvest the honey a box at a time without worry as to the location of the queen. For me, this is especially true for my sourwood honey harvest.
Sourwood is the last harvest for me. When I pull those finished boxes, the production season is over and the bees seem to know it.
They are reluctant to give up a drop. (I don’t blame them.)
If I had to spend a lot of time inspecting each frame in the bee yard, it might set off a robbing frenzy. By using a queen excluder, I am reasonably sure the honey boxes are brood free.
Cons of Using a Queen Excluder
Okay, this may get a bit tricky but I will deal with the known disadvantages first.
They don’t always work 100% of the time. As stated earlier, some queens are able to squeeze through so you still have to do a minimal inspection.
If you have no brood in the middle few frames, you are likely good to proceed with harvest. Still there is a risk of finding a bit of brood elsewhere.
Drone bees are larger than queens and get stuck. Yes, they do. It is not unusual for me to find a couple of dead drones stuck in the wires of my excluder. I do regret it but it is not a big issue for me.
Concerns About Queen Excluders – Not Yet Verified
Some beekeepers feel that you get less excess honey when using excluders. They believe that busy workers are reluctant to want to go through the excluder with nectar.
The idea is that production is slowed and that it may increase swarming due to excess honey in the brood nest.
I have seen no reliable studies that prove this statement. And I have not seen a noticeable difference between hive performance in my bee yard.
The size of a honey crop has so many variables to consider that isolating 1 thing is not easy.
Does queen excluder use reduce your honey crop? I am on the fence for this opinion, as I see the merit in both points of view.
For now, I say “no” they do not – especially with the use of an upper entrance.
Some claim that the worker bees wings are damaged from crawling through an excluder. Again, no definitive answer.
Where to Put the Queen Excluder?
The queen excluder should go under the first one of YOUR honey collection boxes. If your standard hive configuration is a deep and a shallow, the excluder goes on top of the shallow.
The queen excluder goes directly below your honey collection box. When your harvest comes off the hive, so does the excluder.
Which Side of the Queen Excluder Goes Down?
There will be a support wire underneath the main section of wires. The support wire side should face down towards the brood nest area.
Do You Remove a Queen Excluder in Winter?
YES ! When you harvest your supers of honey, take off the excluder. Do not leave the excluder on the hive over winter.
Perhaps you decide that rather than taking the extra honey you will just leave it for the bees. That’s okay but take that excluder OFF!
During Winter, bees will move up in the hive to stay in contact with food. If the cluster moves up through the excluder to the top honey super, the queen bee is left to die. No excluders on the Winter beehive.
Don’t Have an Excluder? What to do?
If you don’t have or don’t want to use an excluder, there is another method you can use to minimize brood in the honey supers.
Honey bee colonies like to keep their brood together in a central area.
They do not like having one area of brood in the bottom box. Then large areas of honey with more brood in boxes above. We can use this tendency for our honey harvest.
Before adding a honey collection box, make sure that every frame on the current top box has a “honey crown” or “honey barrier”.
If you have at least 2” of capped honey on every frame. The queen will not “usually” cross that barrier.
However, sometimes the colony will later eat that honey and move up into your honey supers. (Don’t ask how I know that ? ) Don’t leave ripe honey on the hive too long.
If Bees Won’t Go Through Excluder?
This has rarely happened to me. But I have had 2 colonies over all the years that seemed to consider that excluder as an electric fence.
They were just not having it. (Chances of this happening increases when you are using frames of new foundation in your collection box instead of drawn comb.)
If this happens to you, switch out 1 empty frame (from the collection box) with one frame of honey from the box below. This should encourage the bees to come on up and get to work.
A few weeks later, you can switch back. As a general rule, this is not necessary for my bees because they usually go through with no problem.
It can be difficult to get bees excited about working on a box of foundation. When using an excluder and new boxes of foundation, its best to let the bees start to draw comb.
Then make sure the queen is below and add your excluder. Once new comb is present, the bees will be more eager to go through the excluder.
Using an Upper Entrance
Our modern Langstroth hives have a front entrance at the bottom. One method I have found very useful is to use a top entrance for my hives.
I have a special homemade Ventilated Inner Cover that includes a small upper entrance. You can also accomplish this with a small 2″ shim (rectangle of wood) with a 1″ hole drilled in one side.
This upper entrance is above the queen excluder and I leave the bottom hive entrance as well. In this way, workers or drones can enter and exit the hive from either entrance.
My bees seem to really like this entrance. It gives them a way in and out of the honey supers without going through the brood nest.
Once the warm season is over I can plug it closed for Winter.
Queen Excluders are a useful tool for beekeepers and especially new beekeepers. For many, the value of keeping brood out of honey harvest supers outweighs the possible downsides.
Consider keeping a couple of these tools on hand, they are not very expensive.