I feel this worth contemplating. In the past I've heard of observation claims of hyper reproduction of varroa after treatments. Not seeing follow up on the topic I have not seen a good explanation. Possibly, hormesis could explain the phenomenon.
"Thus, a short working definition of hormesis is: 'a process in which exposure to a low dose of a chemical agent or environmental factor that is damaging at higher doses induces an adaptive beneficial effect on the cell or organism'."
https://www.researchgate.net/publication/255716156_Insects_Insecticides_and_Hormesis_Evidence_and_Considerations_for_Study
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