The problem: The Varroa mite (Varroa destructor) is the biggest pest problem that the modern bee keeper faces in the UK today. The Varroa mite feeds primarily on the fat body tissue of the honey bee larvae and the adult bee, affecting the growth of the individual bee and spreading numerous diseases throughout the colony. If there is a significant infestation of Varroa mites in your hive, this will have a considerable impact on the overall condition of your colony. The colony will produce less honey, be more susceptible to disease and will be less likely to survive the winter. In the UK, the Varroa problem is best handled with an integrated pest management strategy (IPM). Formicpro™ which has the active ingredient formic acid is one of the most effective ways to control the Varroa population in your hive and can be used as part of a successful IPM strategy

The product: The active ingredient in Formicpro™ varroa mite treatment is formic acid. The Formicpro™ mite strip formulation concentrates the formic acid to be an effective toxic bio-pesticide. Formicpro™- mite strips contain 68.2g of formic acid and brown semi-rigid to soft gel covered in a biodegradable laminated paper. The paper wrap acts as a wick to control the release of the formic acid vapours into the hive. Formic acid is commonly found in many plants and is a natural component of honey. When placed in your hive Formicpro™ mite strips release formic acid vapours which are toxic to the varroa mite. Formicpro™ kills both male and female varroa mites under the brood cap where they reproduce and any mites existing on the bees.

  • VMD registered treatment for use in the UK
  • Easy to apply, simply lay strips within the hive
  • Can be left in the hive or added to the compost


Formicpro™ can be used on the hive at any time in the active season when the outdoor temperature range is between 10-29.5°C on the day of application. Formicpro™ will have the most impact on the varroa in your hive when the outdoor temperature range is between 15-25°C. If temperatures are above 29.5°C during the first 3 days, there will be a greater risk of bee, brood, and queen loss.

-           Inspect any colonies that are to be treated ideally 3 days before the beginning of treatment in order minimise disturbance of the colony. The colony should be queen right and strong with a minimum of around 10,000 bees or 6-8 frames of bees in a National hive.

-           Ensure there are enough food stores in the brood chamber of the colony for the duration of the treatment (7 days). If the colony needs to be fed, feed before applying the treatment to the hive, not during treatment.

-           Any supers with honey on the hive should be removed prior to product application. Honey stored in any supers put on for the treatment period must be removed and are not used for human consumption. Spent strips must be removed before supers intended for harvest are placed on the hive. If the colony is expanding and needs space, empty supers or brood chambers can be used to give the colony space.


-           Remove Formicpro™ treatment from the outer foil packaging using acid resistant gloves. Do not remove the strips from the paper wick, this controls the release of the vapours throughout the treatment.

When varroa thresholds are met in your colony, Formicpro™ mite strips should be applied in the following way: Place both strips across the brood nest for 7 days.

-           Position strips on top of the brood frames with a gap of about 5cm between each strip and 10cm between the strips and the end of the brood box.

-           Ventilation and space in the hive is key for the duration of the treatment. Adding an extra super or brood box and removing the entrance block from the hive will give the colony the correct amount of ventilation. The hive entrance must be fully open across the box for the duration of treatment. This will reduce the risk of excessive damage to the colony. Any hives with open mesh floors should have the tray inserted to reduce rapid vapour loss. Bees are not built to move air up through a screen so open mesh floors should not be considered as additional ventilation. Queen excluders can be left on the hive during treatment. Replace the super or second brood box on the hive and set it back by a few centimetres for an extra temporary entrance if the main entrance is reduced and cannot be fully opened. You can also insert wedges at the bottom of the hive to create an extra temporary entrance at the bottom.

Use Formicpro™ for bees as part of an integrated pest management (IPM) program. Regularly measuring varroa mite numbers throughout the active season is an important metric to know about your colonies. This will tell you when the varroa threshold in your colony is met and action needs to be taken.

Do not destroy any queen cells that may be observed prior to or post treatment. Supersedure, even if thought to be set in motion by Formicpro™ mite treatment, is a natural process and should be allowed to proceed for the health of the colony. Verify the colony is queen-right one month after treatment. Mother and daughter queens present post treatment are not uncommon.