Israel’s ToBe has developed a solution to eradicate the Varroa mite – the number one enemy of the honeybee. ToBe’s Hivemaster automatically monitors hives for the mite and at optimal times releases precise minuscule pulses of anti-Varroa compounds (natural or synthetic) without damaging the bees.
https://nocamels.com/2023/10/bee-happy-new-device-protects-hives-from-colony-killing-mites/