Essential oils and honey bee health

The role that essential oils play in the life of a honey bee colony is complex, fascinating, and not well understood. Beekeepers are just beginning to grasp the potential that these oils may have, and recently a host of scientific papers have delved into various aspects of their chemistry.

According to one paper, “essential oil” is a general term for “liquid, highly volatile plant compounds, characterized by an intensive, characteristic odor” (Imdorf et al. 1999). The essential oils that most people are familiar with are the ones used in food, cosmetics, personal care and cleaning products. These include the oils of lavender, peppermint, pine, clove, spearmint, and citrus. Each oil comprises dozens—sometimes hundreds—of plant chemicals, and it turns out that many of these play an important role in bee health.

The use of essential oils as a feeding supplement first became popular with the manufacture of a commercial mix of spearmint and lemongrass oils called Honey-B-Healthy. The oils are kept in solution with water by the use of an emulsifier so that the product mixes easily with sugar syrup. My personal opinion is that Honey-B-Healthy was a stroke of genius. There is much anecdotal evidence to suggest that the use of Honey-B-Healthy increases overall colony health, and helps bees deal with stress, pathogens, and parasites.

In many ways Honey-B-Healthy seems to act like a vitamin pill for bees—all the phytochemicals in the two oils appear to make up for things that are lacking in the bee’s diet. This is especially important where a naturally varied diet is missing, as is the case on much of our farmland.

After writing a research paper on essential oils and Varroa control, I began experimenting on my own with oils such as tea tree, patchouli, anise, rosemary, and orange. My populations expanded quickly and my bees never seemed healthier. Besides being used as “vitamin pills,” essential oils in various concentrations may be used for many purposes, such as:

  • the control of parasitic mites, both tracheal and Varroa
  • an aid in the control of Nosema
  • an aid in queen introduction
  • a mold inhibitor in sugar syrup
  • a lure in swarm traps
  • a feeding stimulant

For the beginning beekeeper, I would suggest using Honey-B-Healthy in both your spring and fall syrups. Although it is expensive, it seems to increase both the size and health of most colonies. And just for the record, I have no financial interest in Honey-B-Healthy, although I wish I did!

Rusty

Comments

The Lazy Drone
Reply

Regarding an emulsifier, honey is a natural emulsifier. I usually put about a teaspoon per qt of sugar syrup. Then add a couple of drops of lemongrass and sometimes a drop of peppermint oil (one side note, ants dislike lemongrass and mint oils, so this also helps to keep them away).

Interesting point regarding anise. Which makes sense considering the bees love anise hyssop flowers.

I’ve had success at catching swarms using a lure made out of lemongrass oil and beeswax. I believe the scent it very similar to the queen pheromone.

I believe almond oil repels bees. Its the main ingredient used in some of the products that are put on fume boards when getting bees out of supers for harvesting. Not sure why though…

mahwish
Reply

Hi. I’m little bit confuse how to apply different essential oils in honey bee colonies against varroa mite? Please help me out because my phd study based on this topic. I will be waiting. Thanks.

Leave a comment

name*

email* (not published)

website