Beekeepers use cool, white smoke from natural plant materials to calm honey bees during hive inspections. The most common fuels are pine needles, untreated burlap, dried grass or hay, wood shavings, and punk wood (soft, rotting hardwood from trees like cherry or hickory). These materials are burned inside a handheld device called a bee smoker, which has a small fire chamber and a bellows to direct puffs of smoke into the hive.
Why Smoke Calms Bees
Smoke works on bees through two distinct mechanisms. The first involves their chemical alarm system. When a honey bee perceives a threat, she releases alarm pheromones, primarily a compound called isopentyl acetate from the sting apparatus. This chemical signals other bees to become defensive. Smoke disrupts their ability to detect these alarm signals, preventing a chain reaction of aggression from spreading through the colony.
The second mechanism is behavioral. When bees smell smoke, they instinctively begin gorging on stored honey, likely a survival response to the perceived threat of fire. Bees busy filling their stomachs are simply less focused on stinging. Research published in the Journal of Insect Science also found that smoke suppresses the release of venom droplets that normally accompany a sting, suggesting it reduces individual bee agitation at a physiological level, not just a behavioral one.
Best Natural Fuels for a Bee Smoker
The goal is cool, thick, white smoke. Hot or thin smoke can irritate bees rather than calm them. Good fuel choices include:
- Pine needles: Widely considered the easiest and most reliable fuel. Many beekeepers pack the smoker canister full of dried pine needles and nothing else.
- Punk wood: Soft, rotting wood from cherry, hickory, or other hardwoods. It smolders slowly and produces steady, mild smoke.
- Untreated burlap: Burns well and stays lit, but you need to confirm it hasn’t been treated with chemicals or pesticides.
- Wood shavings: Clean, untreated shavings from natural hardwood or softwood work well as kindling or primary fuel.
- Dried grass and hay: Free and easy to find, though they burn faster than denser materials.
Everything you burn should be all-natural, free of grease, oil, pesticides, and preservatives. The key rule: if it’s not something you’d be comfortable breathing a little of yourself, don’t use it around your bees or their honey.
Fuels You Should Never Use
Certain materials produce toxic fumes that can harm both bees and beekeepers. Never burn synthetic materials like rubber or plastic, petroleum-based products like gasoline or lighter fluid, or pressure-treated wood. Cardboard and burlap treated with glues or chemicals are also off-limits. Dryer lint, a commonly suggested hack, can contain polyester fibers, pet hair, and residues from dryer sheets. Rags used with household chemicals or heavily dyed cotton should be avoided too.
One hazard that catches people off guard: when gathering wild plant material, watch out for poison ivy and poison oak. Burning either one releases toxic compounds into the smoke that can cause serious respiratory reactions.
How to Apply Smoke to a Hive
The University of Georgia Bee Program recommends a straightforward approach. Crack the hive lid, direct one or two puffs of smoke inside, then briefly replace the lid and wait a moment before opening it fully. Once the hive is open, direct several puffs downward between the frames. This level of smoking is usually enough for a routine inspection. If the bees start getting defensive during your work, a few more puffs will settle them back down.
Less is more. Excessive smoke can stress the colony, drive the queen into hiding, and contaminate honey. USDA standards for commercial honey require it to be “free from smoke,” so beekeepers who sell their harvest have extra reason to use smoke sparingly.
Liquid Smoke as an Alternative
Some beekeepers skip the traditional smoker entirely and use a spray bottle filled with diluted liquid smoke, the same product sold in grocery stores for cooking. A common ratio is one ounce (about two tablespoons) of liquid smoke per 16 ounces of water. Sprayed onto bees, it mimics the calming scent of real smoke with the added effect of dampening wings, which makes bees less likely to fly at you.
Not all liquid smoke products are equal for this purpose. Most grocery store brands contain added sugar, molasses, vinegar, or caramel coloring. Beekeepers who use this method typically recommend choosing a brand with no sugar or sweetener additives, since sugar residue inside a hive can attract pests and promote unwanted microbial growth.
Liquid smoke has clear advantages in fire-prone areas where lighting a traditional smoker is risky. Some beekeepers report it works even better than real smoke. The downsides: the scent lingers in the hive much longer than natural smoke, which means bees stay in an alarmed state after you’ve finished your inspection. It can also impart an off-flavor to honey and beeswax if sprayed too liberally inside the hive. Most experienced beekeepers treat it as a useful backup rather than a full replacement for a traditional smoker.