BEE MITES / VARROA JACOBSONI
A distinct mite—and an important host shift.
Follow the evidence behind the name: original hosts, reproductive populations on Western honey bees, species identification, direct control trials and the historical heat literature.
Expanded October 31, 2026 · 12 linked research sources and guidance documents
One old name, two modern species
Varroa jacobsoni remains a valid species. It was not simply renamed V. destructor. Anderson and Trueman showed that the mites historically grouped under V. jacobsoni contained distinct species; V. destructor is the widely distributed pest familiar to most Western honey bee keepers. [1]
The original V. jacobsoni description concerned mites associated with Asian honey bees.
Modern taxonomy separated V. destructor from the earlier broad grouping.
Reproducing V. jacobsoni was found on Western honey bees in Papua New Guinea.
Host-shift, genomic and field-control studies developed the evidence for this emerging association.
Our full species-comparison guide explains why preserving an original paper’s title and checking its host and location is more useful than rejecting it because of an old name.
Where has it been studied?
| Research setting | What it establishes |
|---|---|
| Asian honey bees, Apis cerana | The original host association and diversity within native mite populations. [1] [6] |
| Papua New Guinea, Apis mellifera | Host-shifted lineages able to reproduce on Western honey bees. [2] |
| Thailand, both bee hosts | Population structure, reproductive compatibility and distinctions between mite lineages. [5] |
| Comparative genomic collections | Genetic differences between V. jacobsoni, V. destructor and their host-associated populations. [4] [7] |
This is a summary of documented research settings, rather than a current country-by-country surveillance map. An older document that says “Varroa jacobsoni” may be using the historical broad name.
The host shift is the important story
A mite found on a bee and a mite successfully reproducing on that bee’s brood are different observations. The 2015 host-shift study established reproductive associations with A. mellifera. Transcriptomic and genomic studies then investigated the changes associated with that new host relationship. [2] [3] [4]
Record whether the bees are A. cerana or A. mellifera.
Confirm the species or lineage when it affects the interpretation.
Brood-cell observations help establish whether the association can sustain a mite population.
Research in the coevolved A. cerana system examines reproductive restrictions and host defenses. Those results should be read alongside the newer Western honey bee populations, rather than assuming both systems behave identically. [6]
Can you recognize it by sight?
| Feature | V. jacobsoni | V. destructor |
|---|---|---|
| Adult female appearance | Generally smaller and more rounded in the taxonomic comparisons. | Generally larger and less rounded. |
| Original host | Asian honey bee. | Asian honey bee. |
| Western honey bee association | Documented host-shifted reproductive populations. | The widespread damaging association. |
| Reliable species determination | Specialist morphology and appropriate molecular identification; a phone photograph or colony symptom is insufficient. | |
The two mites are closely related, but genomic comparisons show distinct evolutionary trajectories. Similarity gives researchers a reason to compare them; it does not erase the need to know which population was tested. [1] [4]
Colony damage, tolerance and viruses
Parasitism of developing bees can affect the emerging adults and colony performance. However, outcomes also depend on the host population and its virus setting. Work in Papua New Guinea examined apparent tolerance to V. jacobsoni in the absence of detectable DWV in the investigated setting. [9]
That finding is useful because it separates mite effects from the particular mite–virus combination commonly associated with V. destructor. It does not establish that all V. jacobsoni populations are harmless or that colonies elsewhere share the same viral conditions.
Two mites can require two management strategies
V. jacobsoni and Tropilaelaps mercedesae have occurred in the same Papua New Guinea management setting. A good response against one mite did not automatically mean the other was controlled. [8]
Testing and sample records
- Measure the infestation: use an appropriate adult-bee sample and brood examination, recording the method and sample size.
- Record the context: bee host, location, date, brood status and recent treatments.
- Confirm unusual specimens: seek a diagnostic laboratory or apiary authority when species identity matters.
- Record co-infestation: investigate Tropilaelaps separately where relevant.
The shared adult-bee sampling guide explains technique. Species confirmation and interpretation still depend on the local population and diagnostic setting.
Direct treatment evidence: Papua New Guinea
Roberts and colleagues compared queen caging, queen removal and Bayvarol in colonies challenged by V. jacobsoni and T. mercedesae. The two mites responded differently. [8]
| Target | Reported outcome | Practical meaning |
|---|---|---|
| V. jacobsoni | Bayvarol maintained reported efficacy above 90% over four months in the trial. | Direct evidence for that product and tested population, not a guarantee for every region or resistance profile. |
| T. mercedesae | Brood-manipulation strategies significantly reduced the mite over two months; Bayvarol did not significantly reduce it compared with controls. | Plan and measure control for each mite present. |
Use registered products according to local rules and their actual labels. Study efficacy is valuable evidence; product availability, registration, colony conditions and mite susceptibility determine how it can be used locally.
Heat research: sort the names before comparing results
| Evidence type | How to read it |
|---|---|
| A species-confirmed modern V. jacobsoni experiment | The strongest direct evidence for that tested population, temperature, time and bee setting. |
| A pre-2000 paper titled V. jacobsoni | Check location, bee host and identification. The historical name may refer to mites subsequently classified as V. destructor. [1] |
| A modern V. destructor experiment | Relevant comparative biology, labeled as related-species evidence rather than a direct V. jacobsoni efficacy result. [12] |
The Le Conte brood study and Harbo adult-bee study are linked in both Varroa sections because their naming history matters. They investigate different bee settings and durations. [10] [11]
Closely related biology provides a reason to investigate heat across Varroa species. A useful direct experiment would record species identity, actual target temperature, exposure time, mite stage and subsequent bee and mite outcomes.
Read the shared 24-hour brood-study sheet and adult-bee heat studies, with that distinction in mind.
What to do with an unusual Varroa finding
Record the finding and contact the appropriate apiary or biosecurity authority for specimen instructions. Keep the bee host and place of collection attached to the record. Avoid moving suspect bees or material until local advice clarifies the finding. Photos can support a report, while specialist identification addresses the species question.
Common questions
Was every V. jacobsoni simply renamed?
No. V. jacobsoni remains a species; the old broad grouping was split. [1]
Can V. jacobsoni reproduce on Western honey bees?
Yes. Reproducing host-shifted lineages have been documented in Papua New Guinea. [2]
Does a colony tolerating this mite prove it is harmless?
No. Host resistance, tolerance, viruses and management all help explain the result. The Papua New Guinea studies provide evidence for their investigated populations. [8] [9]
Should older heat studies be discarded?
No. Identify the tested population and interpret the original methods and outcomes. Historical naming is a reason to investigate context, not to discard useful research.
Our collected research library
12 linked publications, study records and guidance documents. The label on each entry identifies its evidence type. Links lead to the original publication, an indexed study record or the responsible agency. Use the tested species, host and conditions when comparing results.
Anderson & Trueman (2000) — Varroa jacobsoni is more than one species
The taxonomic separation underpinning the modern distinction between V. destructor and V. jacobsoni. Essential when reading studies published under the older broad name.
Roberts, Anderson & Tay (2015) — Multiple host shifts by Varroa jacobsoni
Documents independently host-shifted lineages reproducing on Western honey bees in Papua New Guinea, following the 2008 finding.
Andino et al. (2016) — Gene expression after a host shift
Compares mites that differ in their ability to reproduce on A. mellifera. Identifies gene-expression differences associated with the changed host relationship.
Techer et al. (2019) — Divergent evolutionary trajectories of two bee mites
Compares the genomes of V. destructor and V. jacobsoni. Their close relationship coexists with distinct evolutionary changes and potentially different control needs.
Population genetics of Varroa in Eastern and Western honey bees (2019)
Combines DNA analysis and reproductive observations in Thailand. Shows why host, region and lineage belong in an interpretation of mite identity.
Wang et al. (2020) — Reproduction in the coevolved Apis cerana system
Studies V. destructor and V. jacobsoni haplotypes in Eastern honey bee colonies. Helps distinguish the original-host system from newly established Western honey bee associations.
The first steps toward a global pandemic
Reconstructs population history around host switches using mitochondrial and nuclear genomic information. Addresses origins, diversity and movement between host-associated populations.
Roberts et al. (2020) — Control strategies in Papua New Guinea
Directly tests V. jacobsoni and Tropilaelaps mercedesae in the same management setting. Bayvarol and brood-manipulation strategies produced different results for the two mites.
Roberts et al. (2020) — Tolerance in the absence of deformed wing virus
Examines the viral setting in Papua New Guinea bees tolerating V. jacobsoni. Tolerance in that setting should not be read as a claim that the mite is universally harmless.
Le Conte, Arnold & Desenfant (1990) — Brood temperature and humidity
Published under V. jacobsoni before the modern species separation. Included here to explain the naming history; determine the tested population before treating it as modern V. jacobsoni evidence.
Harbo (2000) — Heating adult bees to remove Varroa jacobsoni
A shared thermal reference whose original title retains the historical name. It is not, by its title alone, a species-confirmed modern V. jacobsoni treatment trial.
Kablau et al. (2019) — Hyperthermia against Varroa destructor
A clearly identified V. destructor study for comparison of mite stages, duration and bee outcomes. Related-species evidence is labeled separately from direct V. jacobsoni trials.
Shared guides & research
Start with these guides when you need to identify a mite, compare species or understand treatment evidence. Use the mite-specific information on this page to choose the appropriate tests and controls.