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  • Fumagilin-B
  • Fumagilin-B
  • Fumagilin-B
  • Fumagilin-B


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Fumagilin-B has a high specific action against Nosema apis, a microscopic, single-celled parasite which causes Nosema disease in honey bees and is used as an aid in the prevention of Nosema in honey bees.

The treatment should be administered with autumn/fall and spring feeds as necessary and, as ever, it is vital that beekeepers follow label directions precisely.

Residents of Alberta are required to provide a PID to purchase this item. 

If you have not already provided your PID, please add it to the notes portion of your online order.

Find more information on getting your PID click HERE. 


454g jar contains the equivalent of 9.5 g Fumagillin base which is sufficient to prepare 380 Litres of medicated syrup for feeding of 100-110 package colonies or for fall feeding of 50 wintering colonies.

96g jar contains the equivalent of 2.0 g Fumagillin base which is sufficient to prepare 80 Litres of medicated syrup for feeding of 22 package colonies or for fall feeding of 12 wintering colonies.

24g jar contains the equivalent of 0.5 g Fumagillin base which is sufficient to prepare 20 Litres of medicated syrup for feeding of 5-6 package colonies or for fall feeding of 3 wintering colonies.

Medicated syrup is best prepared at a concentration of 25 mg Fumagillin base per Litre of syrup, usually as a 2:1 syrup (two parts of sugar to one part of water). Fumagilin-B may be dissolved in water or syrup at room temperature. For best results, heat the required amount of water to 35-50˚C, then remove the heat source and add the Fumagilin-B and the sugar in that order. To prepare this concentration of medicated syrup, use the following chart:

165 L 330 kg 380 L 454 g
35 L 69 kg 80 L 96 g
8.7 L 17 kg 20 L 24 g
1.8 L 3.6 kg 4 L  5 g


Good agitation is essential to assure uniform distribution of the medication. For the protection of wintering colonies, medicated syrup is best fed in the fall if it is fed only once per year. There may be advantages to feeding medicated syrup in both the fall and the spring.


Fall Treatment: After all honey supers have been removed, feed medicated syrup at the following rates: 7-8 Litres for each 2 chamber colony (approximately 30,000 bees) 4 Litres for each 1 chamber colony (approximately 18,000 bees) 3 Litres for each 5 frame colony (approximately 12,000 bees) Feed additional unmedicated syrup to desired colony weight for wintering.

Spring Treatment: In the spring when colonies are stressed due to inclement weather conditions, mite infestations, other disease factors or intensive spring management, additional Nosema control may be indicated. In such cases, feed medicated syrup at the following rates: 3-4 Litres for each 2 chamber colony (approximately 20,000 bees) 2 Litres for each 1 chamber colony (approximately 12,000 bees) 1-2 Litres for each 5 frame colony (approximately 8,000 bees) 3-4 Litres for each package colony Feed additional unmedicated syrup to provide nourishment until nectar is available. Package bees may have been fed medicated syrup in transit, but such feeding alone is not sufficient to protect against Nosema. Each package colony is best fed Fumagilin-B immediately after installation. Colonies used for package production should be fed medicated syrup as a principle food source for one month prior to taking to market. Heavily infested colonies that will no longer take in syrup may be sprayed repeatedly, directly on the bees, frame by frame with a 1:1 sugar syrup (one part sugar to one part water) containing 2 g of Fumagilin-B per Litre of syrup.

WARNINGS: To avoid violative residues in honey, Fumagilin-B should be fed early in the spring or fall and consumed by the bees before the main honey flow begins. Complete treatments at least 4 weeks prior to the main honey flow. Honey collected in supers before the end of the 4 week withdrawal period should not be harvested for human consumption. Honey from brood nest areas of colonies treated with Fumagilin-B should not be harvested for human consumption. When handling the product, avoid inhalation, oral exposure and direct contact with skin or eyes. Keep out of reach of children.

STORAGE: Store below 25˚C, protected from sunlight. Keep from freezing. Once mixed, do not expose medicated syrup to sunlight.



  • If you are not satisfied with your purchase from our online store, you may return the unused product complete with original packaging and tags intact to the Online Store within 7 days of receiving the item for a refund less a 15% restocking fee  (transaction fees) or 30 days for a store credit.

    Due to bio security concerns, no products that have come into contact with bees, honey or wax can be accepted for return or exchange.

    All returns must be authorized via email or phone prior to shipping. Please e-mail info@workerandhive.com or call 403-764-8177 to start the return process.

    Discounted items or items purchased with a promo code are considered a final sale.  Discount codes may not be retroactively applied to previous orders.

    No exceptions.

  • Beekeeping products can be tough to ship! Here is our shipping policy.

    Shipping Policy

    Thank you for supporting Worker and Hive Bee Supply. The following are the terms and conditions that constitute our Shipping Policy.

    Shipment processing time: All orders are processed within 2-3 business days. Orders are shipped Tuesday through Friday, excluding holidays. If we are experiencing a high volume of orders, shipments may be delayed by a few days. Please allow additional days in transit for delivery. If there will be a significant delay in shipment of your order, we will contact you via email or telephone. 

    Shipping rates & delivery estimates: Shipping charges and estimated delivery times for your order will be calculated and displayed at checkout. Please contact us directly should you feel that the quote is inaccurate and we will manual calculate order shipping rates. Although delivery delays can occasionally occur, we value your time and make every effort to to get your purchased items to you quickly. Occasionally, the carrier you have selected may not be the best option for delivery and we will substitute a comparable delivery option for your order. 

    Shipment to P.O. box addresses may not always be available for carriers other than Canada Post. Please confirm that your requested carrier (Purolator, UPS etc..) services your address prior to placing your order. We can not be responsible for unclaimed packages and will only refund the difference between product price and shipping fees. 

    Shipment Confirmation & Order tracking: You will receive a Shipment Confirmation email once your order has shipped containing your tracking number(s). The tracking number will be active within 24 hours.

    Customs, Duties and Taxes: Worker and Hive Bee Supply is not responsible for any customs and taxes applied to your order. All fees imposed during or after shipping are the responsibility of the customer (tariffs, taxes, etc.).

    Damages: Worker and Hive Bee Supply is not liable for any products damaged or lost during shipping. If you received your order damaged, please contact the shipment carrier to file a claim. Please save all packaging materials and damaged goods before filing a claim.

    International Shipping Policy: We currently only offer international shipping to the U.S. Please contact us directly should you wish to have your purchase shipped to a country other than Canada or U.S.

    Returns Policy: Our Return & Refund Policy provides detailed information about options and procedures for returning your order. It can be found HERE.

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