1.6.1 Varroa: brood interruption method

Brood interruption replaces the first summer treatment with formic acid. The second summer treatment must be carried out as before in order to keep the level of mite infestation as low as possible until the winter treatment and to prevent potential reinvasions. Only in exceptional cases, and in very isolated apiaries with regular infestation monitoring, is it possible to dispense with the second summer treatment.