I found this report in the Guardian, it tells of the catastrophic effect VAROA mites are having on bee colonies. The report is very worrying. It says Varoa are becoming resistant to miticides. Hopefully this link I share works and you can read the article for yourself. https://www.theguardian.com/environment/2025/jul/08/record-us-bee-colony-dieoffs-climate-stress-pesticides-silent-spring-aoe
Peter Kirkup
PBKA Asian Hornet Coordinator
Pembrokeshire Beekeepers' Association 
Well stressing bees doesn’t help them so monoculture is a big part of the problem. “Heavy use” of the treatment plus neonics is also a stressor. I’m not complacent but this is a different country. There’s stuff to learn for sure.