02/06/2026
Secondary update on the Varroa Front..... The Resistant Mite Spread
We have just received yesterday - results on mite samples we conducted in April across a number of suburbs.
I thought it important to share this information asap as we had an idea it was bad but now we truly know how bad the resistance mite load actually is throughout Brisbane.....
To say we are disappointed would be an understatement, the sense of urgency and communication to get this type of information out to beekeepers that are making daily decisions on thier colonies and finances - has a lot to be desired in our opinion.
These samples were submitted and collected on the 14th April and results communicated the 1st of June.
For us - In that time we have condensed and treated entire apiaries (150 colonies) using Bayvarol and now Apivar. Over $3000 spent on treatments and wages to now learn we have to do it all again as the mites have up to 100% resistance to both products in some of our apiary locations -
a ticking time bomb for entire collapse and spread now.
The attached two pics - one is the data of actual samples we collected (personal data covered for obvious reasons) the other a suggestive map of areas we suspect to be most impacted by resistance. Information below to explain further -
We have asked for DPI to release more findings or to construct a map for us to use but we have been informed their test results are not for public disclosure at this stage.
DPI response is "to continue to use different modes of treatments and to check efficacy rates and suggested to check wash counts again a week after treatment applied".
What has been confirmed is that the Brisbane and Ipswich areas have resistant mites and the spread is vast - areas like Kingaroy, Bundaberg, NSW and Victoria all have confirmed cases of the resistant mite, without testing samples we don't know the percentage of impact.
I'll let you all be the judge of all this information but hope talking about it and sharing it can help you with your management of this pest.
Thanks
Rick
Data example pic 1
Using say example 3 in Pullenvale 70 % of the mite sample tested resistant to Pyrethroid and 80% of the sample tested resistant to Amitraz. Highlighted in red due to the high number of resistant mites in the sample provided for testing.
Next line Marburg zero mites tested resistant to both modes of treatment.
Pic 2 - Suggested impact of resistant mite spread across Brisbane