The second day of the Iowa Honey Producers Conference included more presentations and the Youth Scholarship Luncheon. Here is the link to our blog post on the first day of the IHPA conference. Saturday started with the introduction of the new board and the contest awards.
Abigail and Olivia laid out the name tags for the Youth Scholarship Recipients.
The map shows where the Youth Scholarship Recipients are located.
The first presentation we sat in on was Varroa Feed on Hemolymph and Two Other Alternate Facts given by Dr. Sammy Ramsey. Dr. Ramsey began his presentation by stating that varroa mites wiped out feral bees around 1997, ten years after their arrival. The purpose of Dr. Ramsey’s presentation was to walk through the process of how he discovered that varroa mites do not feed on Hemolymph (blood).
What varroa mites feed on has not been confirmed because their feeding behavior is very hard to observe. The first hypothesis Dr. Ramsey developed was mite digestive system and excrement shows similarities to other hemolymph or fluid feeding arthropods. This theory expects that varroa mite feces is very watery because hemolymph has a high water content. He observed, however, was >95% guanine with very little water content. Another expected proof based on this theory is the digestive system has a filter chamber-like modification perfect for digesting hemolymph. The observed was that their were no modifications to shunt excess water away from midgut. This means that the varroa mite’s digestive system is not made for digesting hemolymph. So there is no proof that the mite digestive system and excrement show similarities to other hemolymph or fluid feeding arthropods.
The second hypothesis Dr. Ramsey developed was varroa mite lineage shows that varroa mites are closely related to other lymph feeders. The expected is that varroa are closely related to other dilute fluid-feeding mites. Mites, however, are closely related to predatory mites that feed through extra-oral digestion. When varroa mites were compared to these other mites, it was found that they share similar digestive system structuring.
The third hypothesis Dr. Ramsey developed to prove that varroa mites feed on hemolymph was varroa mites are observed feeding wherever hemolymph is present. The expected is that the varroa mites are able to feed from a variety of location. Varroa mites, however, strongly prefer the underside of the bees thorax and abdomen.
The next hypothesis is varroa feed exclusively on the hemolymph of adult and immature bees. Of course, this hypothesis is automatically wrong if varroa mites do not feed on hemolymph.
The next hypothesis is varroa mites will usually be found on top of the worker bee’s thorax. This is false. Varroa mites are most often found on the underside of the bees thorax and abdomen.
When a varroa mite is on an adult bee it feeds on the bee. The mite pushes itself between the bees plates and the mite pierces multiple layers of soft tissue. The varroa mite than sucks out some of the bees fat body (which acts as the bee’s liver) and uses extra oral digestion to digest it. Varroa mites do not feed on hemolymph, but on fat body.
Varroa mites feeding on the honey bees’ fat body effects the honey bees’ growth and development, metamorphosis, nutrient storage and mobilization, metabolic activity, water loss and osmoregulation (this has to do with the control of water in the honey bee’s body), temperature regulation, pesticide detoxification, protein synthesis, immune function, and viteliogenesis (part of reproduction). As you can see varroa mites feeding on honey bees result in all sort of problems in the bees body which causes problems in the colony. It is incredibly important that beekeepers know how to prevent varroa mites from overrunning their hives.
What should the change in our knowledge of what varroa mites actually feed on cause beekeepers to do? It should cause us to reevaluate how we treat for them. Here is the link to Dr. Ramsey’s Facebook page.
The second presentation was given by Dr. Megan Milbrath. Her presentation was entitled Do You Know What to Do about American Foulbrood. American Foulbrood is a bacteria and can form spores. AFB is environmentally stable. It has been around since around 1967 and has the potential to devastate a beekeeping operation. AFB is not related to European Foulbrood (EFB). There is only one type of AFB in America and it has a lower virulence. Fun fact: Humans can get AFB only if they inject honey with AFB spores into their bloodstream. (Do NOT inject honey into your bloodstream!)
How does AFB get spread? AFB is often spread by a beekeeper moving equipment around in a apiary or between apiaries. AFB can also be spread through robbing or swarming. Unlike a lot of honey bee diseases, AFB is not brought on by stress. AFB is also not caused by a failing queen. To prevent AFB from spreading beekeepers can practice good hive hygiene. They can wash their hands between apiary locations and wear gloves. Another important step to prevent the spreading of AFB is to clean hive tools between apiary locations. Hive tools can be cleaned with bleach or they can be cleaned with flame. A lot of beekeepers will stick their hive tools in their smokers to clean them.
It takes less than ten AFB spores to cause a hive to be infected. The spores only effect larvae at 12-48 hours. The larvae are often fed food with AFB spores in it. Nurse bees spread AFB because the spores can remain in nurse bee’s crops. The first step to a hive becoming infected is the introduction of spores. Once spores are introduced and the proper conditions exist the spores germinate. Next the spores reproduce. Once their is no more food for itself, the disease turns back into spores. AFB kills bees from the inside out. The honey bee larvae eat food infected with AFB spores and the spores fill the larvae’s intestine. The spores actually disintegrates the bee from the inside. The larvae dies just as it is being capped.
How can a beekeeper prevent AFB? AFB is not yet a normal occurrence and practicing good hive hygiene helps prevent it. Once AFB is in a hive, there is nothing a beekeeper can do to get rid of it because spores last for up to seventy years. Early detection is key to preventing AFB from spreading. Three signs of AFB that are not unique to AFB are a spotty brood pattern, sunken cappings, and holes in cappings. A spotty brood pattern may be a sign of AFB because some of the larvae dies due to AFB, but some of the larvae makes it to adulthood. Sunken cappings may be a sign of AFB because the larvae died after being capped and the cappings sunk because the disintegrated larvae did not keep them up. Hole in cappings are a sign that the bee died before it could be completely capped. Three signs of AFB unique to AFB are caramel colored dead larvae, pupal tongue sticking out, larvael scales, and the characteristic smell. When a hive is infected with AFB, the dead larvae are caramel covered and their tongues are sticking out. Caramel colored brood and sticking out tongues are not always present in a hive infected with AFB and not every beekeeper can smell the characteristic smell. The dead larvae appear scaly on the frame of a hive infected with AFB.
If a beekeeper suspects he has AFB, he should take a field test and send a sample into the National Laboratory. There are four types of tests their are commercial diagnostic tests, the match stick test, the Holst milk test, and the Elisa test. If you would like to know more about any of these tests, google them. In Iowa, AFB is a reportable disease. If a beekeeper has AFB, some states require him to burn the hive (equipment and bees) and bury the ashes. In Iowa a beekeeper must destroy all the bees and the comb. Here is the link to the Iowa government page that describes protocol for AFB. Not all states require that the equipment be burned. The goal of the beekeeper is to stop the infection and to prevent the spores from forming. Dr. Milbrath said that the best option is to burn at least the comb and the bees. Bees and equipment can also be disposed by being double bagged in contractor’s bags and disposed at the landfill. If everything does not have to be burned, then the beekeeper can shake the bees into a completely new hive, treated with antibiotics, and the yard should be treated as a quarantine for a whole year. The antibiotics should be transitionally stopped throughout the year. Equipment that is not burned should always be sterilized.
AFB can infect any colony and spreads easy. Eliminating the spores is critical to preventing AFB. Bees with hygienic behavior may be good at preventing AFB from spreading. Here is the link to Dr. Milbrath’s website.
Our friend, Joanna, is a 2019 IHPA Youth Scholarship Recipient. Before lunch, Abigail, Joanna, and the 2018 and 2019 IHPA Youth Scholarship Recipients socialized and shared their years and talked bees.
Here are Mom and Olivia waiting for the Youth Scholarship Lunch to begin.
Here is Olivia, Mr. Mike, and Abigail talking about Abigail’s first year of beekeeping.
Here is Abigail giving her presentation. We blogged her presentation in this blog post.
Here is Abigail receiving her certificate of completion and Mr. Mike receiving his award for being a mentor.
Here is Abigail and Mr. Mike with their certificates.
Here are the 2019 Youth Scholarship Recipients. We wish them all the luck as they begin their beekeeping adventure.
The next presentation Abigail and Miriam sat in on was Very Advanced Queen Rearing by Dr. Tom Repas. The first question he posed was “Why would a beekeeper rear a queen?” One reason is cost. A “homemade” queen is free. She is also available whenever you can make her. The selection is much greater when a beekeeper makes his own queens because a beekeeper never makes just one queen. A beekeeper may choose to sell his queens which can be a source of income. Home reared queens tend to have a higher quality than bought queens. Since queen quality is so important, Dr. Repas explained what it is. A quality queen lays a large number of quality bee, produces viable offspring, and passes on genetics. A poor queen will create a less productive colony; while a productive queen will create a strong, productive hive. A longer queen is a better queen.
The quality of a queen is based on how she was raised, how healthy she is, and how well inseminated she is. Bees can raise their own queens and often do. An emergency queen the bees raise may not be as high quality a queen. A grafted queen is a queen a beekeeper decides the bees need to raise but not keep. The age of the larvae when grafted is very important. Small, young larvae are best for grafting. A beekeeper must know what kind of chemicals are around when he is grafting. Chemicals can affect the queens biology and physiology. Nosema and varroa caused viruses can effect the quality of the queen. Honey production is related to the queen’s quality.
Genetic diversity in a queen results in higher colony productivity, reduced brood diseases, and greater colony survival. New genetics are not introduced often into a hive. Well mated queens will create diverse offspring. Dr. Repas said that five million or more stored sperm cells in a queen is ideal. Poorly mated queens are more common in queens raised in the spring and late in the year.
The rate of supersedure is significantly less for local queens. This difference in supersedure is due to transporter stress. The longer a queen is allowed to lay before shipment increases her chances of acceptance. Supplemental feeding may not have an effect on queens. Honey bees should only be fed when needed. Feeding increases acceptance rate.
How should queens be assessed? Queens performance, physical characteristics, and health should all be monitored. She should have skipped less than 10% of the cells on a frame. There should be the proper amount of drones in the hive which varies depending on the time of year.
What practices are essential to making quality queens. A good breeder queen will produce quality queens. Some queens are just not fit to make queens and after a couple years queens are no longer viable and need to be replaced. Queen producing colonies should be well fed. Queen producing colonies can be additionally fed to be sure they are strong and healthy. There should be lots of unrelated drones around when queens are produced. This helps ensure diverse genetics. Warm, sunny days are preferred for queen rearing.
There are a couple different ways to go about making a queen. Three ways are mating nucs, emergency response, and an overcrowded, well-fed hive. A mating nuc is used because the beekeeper wants to have a small, easily controlled hive to make queens in. Emergency response is not a good way to make queens because emergency queens are not often quality queens. Some beekeepers make queens in overcrowded, well-fed hives. The bees make queens in this hive because they are so crowded that they want to swarm. The beekeeper then keeps the queens and does not let the bees swarm.
Next Dr. Repas described how to make a queen. If you are interested in learning about how beekeepers make queens, I would suggest watching some YouTube videos. I am not going to write out the process here because it is very complex and I am not sure I understand all the steps yet. Dr. Repas main point was well-bred, well-fed, and well-mated queens is the goal of raising queens.
Ellen Bell also gave a presentation on queen rearing. She gave it at the same time as Dr. Repas so Mom, Bethany, and Olivia sat in on her presentation. Ellen Bell stressed the importance of local queens and how they are more reliable than queens that have been brought in. She said it is especially important to make queens from overwintered colonies because the beekeeper knows they are hardy bees.
One good way to collect and keep data is through Facebook bee groups and bee clubs. Our blog is even a way to collect data because we share what we have learned and what we have done. By electrically monitoring beehives, a beekeeper can learn what is going on in their hives. The benefit of electronic monitoring is being able to constantly check on them. A beekeeper can electrically monitor their hive’s weight, temperature, humidity, sound, motion, and video. All of this data can be collected and kept for comparisons. A beekeeper then can compare how beekeeping has changed throughout the years. Fun fact: One bee weighs 1/10 of a gram.
The final presentation we sat in was Treatment Free Beekeeping presented by Joy Westercamp, the 2018 IHPA Honey Queen. She started her presentation by saying that every beekeeper defines “treatment free” differently. Joy defines “treatment free” as not using any chemicals. Joy has been treatment free for seven of eight years. She has Minnesota hygienics bees. She uses screened bottom boards that she leaves open all year long. She does brood brakes for her comb honey hives and drone frames in every hive body.
Why would a beekeeper be treatment free? One reason is the beekeeper does not have to spend any time or money on treatments. Another reason is some pests and diseases are resistant to treatments and more and more are becoming resistant. Some treatments can be harmed by chemicals. This is especially true if the beekeeper uses the chemical incorrectly. The beekeeper can be harmed by some of the chemicals. For example, if a beekeeper does not wear a respirator when vaporizing oxalic acid, he may be harmed by breathing it in. The final reason is some consumers prefer to buy honey and other products from treatment free beekeepers.
How does a beekeeper prevent pests and diseases from overtaking their hives if they are treatment free? A treatment free beekeeper uses some specific management practices. Brood breaks are used by treatment free beekeepers to prevent varroa mites from overrunning the colony. Brood breaks prevent the varroa mites from reproducing. A beekeeper will split or replace the queen to create a brood break. Drone trapping is another method of varroa mite prevention. Varroa mites prefer to reproduce in drone cells. A beekeeper will put a drone frame into the hive and the bees will build it out and have the queen lay eggs in the cells. Then, once the brood is capped, the beekeeper will pull out the drone frame, freeze the frame, then will scratch open the cells, and count how many mites are on the brood. A treatment free beekeeper may use a screened bottom board to prevent the buildup of varroa mites. When the varroa mites fall of the bees, the mites fall through the screen. Another varroa prevention method is sprinkling powder sugar on the top of the boxes. The varroa mites will either be knocked off the bees or the bees will clean them off. Then the varroa mites will fall to the bottom of the hive where they will either fall through a screened bottom board or stick to a tray with petroleum jelly on it. A treatment free beekeeper will feed yearly and often to keep the bees strong and healthy. Treatment free beekeepers will break down their small unproductive colonies. Treatment free beekeepers try to only keep the strongest hives because then eventually only strong stock will be around. TF beekeepers cull their comb early and often. Comb culling prevents the buildup of diseases. Resistant stocks is what treatment free beekeepers like to have. Russians, varroa sensitive hygienics (VSH), Minnesota hygienics, and Purdue ankle biters are some of the more common resistant stocks. Hygienic behavior can help with AFB (as discussed above), chalkbrood, virus loads, deformed wing virus, and Kashmir virus.
The IHPA was an excellent, information packed conference. We really enjoyed it and learned a lot. We are very excited for the 2019 conference.