Common Bee Pests and Diseases | Beekeeping 101 | The Old Farmer's Almanac

Beekeeping 101: Common Bee Pests and Diseases

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Keep An Eye Out For These Problems in Your Hive

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A very important part of successful beekeeping deals with honey bee health. Learn about the most common bee pests and diseases and how to manage them in your apiary. 

This is the last installment of our Beekeeping 101 series—your hives should be humming along now! 

Common Bee Pests, Diseases, and Problems

Colony Collapse Disorder (CCD)

During the winter of 2006, beekeepers began to report much larger than normal losses of bee colonies. These colonies would fail suddenly, with most of the workers disappearing from the hive, leaving the queen and a handful of young bees to fend for themselves. This phenomenon came to be known as “Colony Collapse Disorder.”

The possible causes of CCD are still being debated today. Researchers agree that the disorder stems from a combination of problems, but continue to search for a definitive answer.

Varroa Mites

Varroa mites attack both adult and larval bees, feeding off the bees. This weakens the bees and ultimately shortens their lifespans. In fact, Varroa mites are the #1 killer of bees worldwide due to their ability to spread bee viruses and diseases.

You can not prevent your colony from Varroa infection, but you can save your colony from failure. There are many approved mite treatments available for use in the war against Varroa. From approved synthetic chemicals to softer organic miticides, several treatment types are available. ApiVar, Api-Life Var, Apiguard, Hopguard, Formic Acid and Oxalic Acid are just a few of the choices. 

Bee with Varroa mite
A Varroa mite on the back of a bee.

Each type of treatment has its pros and cons. Find the best method that fits your climate and your beekeeping philosophy. Then, monitor the mite levels in your colony. If your hive needs treatment, do it as soon as possible to reduce the infestation.  


Pesticides are effective at killing insect pests, but bees, butterflies, and other beneficial insects are susceptible to many of the pesticides that our culture depends on, too. Unfortunately, these pesticides sometimes end up in our soil and water, and the contamination is having an effect on our pollinators. 

Debate continues over the true extent of the impact of pesticides on bees. To protect your colony from harm, avoid using pesticides on flowers and crops that the bees may come into contact with—or, if pesticide use is necessary, avoid using them when plants are in bloom. Also be sure to read the pesticides’ labels and follow the given usage guidelines to avoid unnecessary bee deaths.

American Foulbrood Disease (AFD)

American Foulbrood is caused by the Paenibacillus larvae bacteria, which kills the sealed broods of honey bees. This disease is highly contagious and can easily spread throughout a hive and from one colony to another. 

Spores from the bacteria can live in beekeeping equipment, such as frames and supers, for years. For this reason, buying used equipment can be risky.

There is currently no surefire cure for American Foulbrood, though antibiotics have been shown to slow down the disease. However, due to the persistence of the bacteria, this is not a long-term solution. Some states require the destruction of infected colonies outright. 

If you suspect that your colony has been infected, contact your state’s Apiary Inspection Service for management advice.

Bee brood
A bee peeks out from a brood cell.

Winterizing Your Bees

The amount of preparation required for winter depends on your climate. A strong, healthy colony with proper winter food stores can survive the season without issue in most regions. Make sure that your colonies are well fed before cold arrives with sufficient food stores for your area. Close off most of the hive entrances to keep out cold drafts and mice.

If you live in a region with bitter cold, you can wrap your hives up for the winter. However, note that ventilation is very important for bees—even during winter. 

This is where the local component of beekeeping plays a big role. What type of winter preparations do other beekeepers in your region use? Do they face problems with other diseases or pests? Consulting with them will be a big help in preventing problems with your own colony.

Additional Resources

This Beekeeping 101 series is just a primer—a honey-sweet taste of what beekeeping is all about! If you’d like to learn more, the following resources may be useful reading and research before investing in an apiary.

  • The Hive and The Honey Bee published by Dadant and Sons provides a textbook understanding of honeybees.
  • The ABC & XYZ of Bee Culture is an encyclopedia of various beekeeping topics.
  • The Beekeeper’s Handbook by Diana Sammataro and Alphonse Avitable
  • The Backyard Beekeeper by Kim Flottum
  • The Honey Bee Hobbyist by Norman Gary

Also, contact local beekeeping clubs in your area to find personal advice and like-minded souls. Look online or contact your local cooperative extension services office for advice.

Beekeeping 101: Raising Honey Bees in Your Backyard

Read through our Beekeeping 101 series to get an overview of backyard beekeeping:

  1. Should You Raise Honey Bees?
  2. Planning for Honey Bees
  3. Beekeeping Supplies, Clothing, and Equipment
  4. Choosing a Type of Beehive
  5. Where to Get Honey Bees
  6. Harvesting Honey
  7. Common Bee Pests and Diseases (You are here.)

Online Beekeeping Class! 

beekeepercharlottelogo.jpgA thank you to Charlotte Anderson, Master Beekeeper from South Carolina, who consulted on our beekeeping series! 

Charlotte runs an online beekeeping class! An informed new beekeeper has a much greater chance of beekeeping success.

Check out Charlotte’s class to get off to a Buzzin Start!

About The Author

Catherine Boeckmann

Catherine Boeckmann loves nature, stargazing, and gardening so it’s not surprising that she and The Old Farmer’s Almanac found each other. She leads digital content for the Almanac website, and is also a certified master gardener in the state of Indiana. Read More from Catherine Boeckmann

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