Necessary knowledge: Tropilaelaps is not “a new type of varroa”. It is a separate genus of parasitic mites that reproduces on honey-bee brood. Its resemblance to varroa, expanding geographic concern and ability to travel with bees make it one of the pests European bee-health authorities watch closely.
What is Tropilaelaps?
Tropilaelaps mites are ectoparasites of honey-bee brood. Several species are recognised. Like Varroa destructor, they reproduce in capped brood and can damage developing bees and contribute to virus transmission. They are generally narrower and move rapidly across the comb, which can help distinguish a visible mite from varroa—but visual identification alone is not enough for an official conclusion.
Why beekeepers compare it with varroa
- Both reproduce on developing brood.
- Both weaken colonies directly and through associated viruses.
- Both can cause abnormal brood and deformed adult bees.
- Both can move through trade and movement of colonies, brood and queens with attendants.
A crucial biological difference is that Tropilaelaps depends strongly on brood. That affects surveillance and control logic, but it should not be converted into a homemade treatment protocol where the pest is regulated or absent.
Where is it?
The European Commission currently describes Tropilaelaps as absent from the European Union. The Commission nevertheless regulates bee imports and movements to reduce the risk of introduction. Emerging detections in regions neighbouring the EU are a reason for heightened surveillance, not evidence that every unusual mite in Europe is Tropilaelaps.
Possible signs
- Irregular or patchy brood.
- Perforated cappings and dead brood.
- Adults with deformed wings or shortened abdomens.
- Small, fast-moving mites on brood comb.
- Colony decline that resembles severe varroosis.
These signs overlap with varroa, viruses and brood diseases. Confirmation belongs to an authorised laboratory or competent authority.
What to do if you suspect it in a country where it is absent
- Stop moving bees, brood, combs and used equipment.
- Close the hive after making safe observations.
- Record the apiary, colony, date and origin of recent purchases.
- Take photographs without crushing or discarding the specimen.
- Contact the competent animal-health or apiary authority immediately.
- Collect or send samples only according to their instructions.
Do not privately transport a suspected exotic mite to another beekeeper for identification.
Import biosecurity matters
EU entry rules permit tightly controlled consignments such as a single queen with a limited number of attendants. After transfer, cages, attendants and accompanying material may require official examination to exclude small hive beetle and Tropilaelaps. Buying from an online seller does not remove the importer’s responsibilities.
Sources
- World Organisation for Animal Health: diseases of bees
- European Commission: movements and entry into the Union
- Swedish Board of Agriculture: bees and bee-health rules
Reviewed 16 October 2026. Distribution and legal duties can change. Suspected exotic pests should be reported to the competent authority; this is not a diagnostic guide.