Greetings I cannot believe we are going back over this topic. I do not see anything new being added. Anyone who has not read Martin's paper, I can send it. "Although reproduction of Varroa is affected by the space between the developing bee and cell wall, reducing cell sizes as a mite control method will probably fail to be effective since the bees are likely to respond by rearing correspondingly smaller bees" (from "Reproduction of Varroa destructor in South African honey bees: does cell space influence Varroa male survivorship?" by Stephen J. MARTIN, Per KRYGER) -- Peter Borst <[log in to unmask]>