Its ironic that I stopped treating because I couldn't afford the soaring cost of treatments.
Back in the 90's a 5 hive treatment of Bayvarrol cost £25. I had 30 hives then, so, 6 boxes would have cost £150.
As a struggling student, I had to make a choice between treating my bees and continuing my studies. The choice really was that clear. So, I continued my studies. I lost colonies, but some survived. I realised that all I was doing was lining the pockets of BAYER and the other chemical companies. This was long before we discovered that wax was soaking up the chemicals and making drones infertile though.