Habit is the worst enemy in the fight against varroa.
We can no longer apply the same control strategy every year with the hope of achieving the same result.
Did you know?
A Varroa infestation of 3% can reduce honey production by an average of 5 kg of honey per hive and up to 13 kg per year (28 pounds).2
Bioassay protocols to detect amitraz resistance have been proposed by several researchers in the previous years. But the variation of protocols can lead to different results. In addition, the result does not predict the exact field efficacy of an authorized treatment.
1- Varroa mites and honey bee health: can Varroa explain part of the colony losses?, Yves Le Conte, Marion Ellis and Wolfgang Ritter, Apidologie 41 (3) 353-363 (2010)
2- Maisonnasse et al, 2014 – Study carried out by INRA (France) between 2009 and 2012 on 552 hives. Average of 5kg [11lbs] (up to 13kg, or 28lbs, per year) on a lavender honeyflow.