re Ficam-W - my friend, who breeds a lot of chickens and quail, is very hot on biosecurity and has never had any redmite until earlier this year, when a wild pigeon flew in through the open door to one of the covered runs and was found sitting on a box inside. She chased it out, and a week later noticed a great heaving pile of redmite on top of the box. It had spread very fast to her other runs as well. Knowing Ficam-W was effective but had a lot of health warnings attached, she was of course concerned for her health and that of the birds, so she consulted a friend of hers who works in neurological medicine. He said that, in his opinion, given careful and sensible application according to the directions, it was no more dangerous than, for instance, garden weedkillers which people often spray around regardless. She removed all the birds, the chickens got penned up somewhere and the quail spent the day in cardboard boxes on the lawn, cleaned out the coops, donned disposable gloves and a suitable anti-chemical mask. The Ficam comes in a soluble plastic pouch which you add to a measured amount of water in a small hand sprayer. She then carefully sprayed the joins and cracks where the redmite might lurk and said none of it blew around and she didn't feel in danger of inhaling it. Only small amounts were needed and when it was dry she replaced the birds. The birds showed no sign of being affected by it, then or since, and the redmite was GONE - no re-emergence so the eggs were obviously killed as well as the adults. Since then, several months ago, there has been no signs of any mites. She says she doesn't know why anyone would bother with anything else less effective.
Well, I'm not speaking from personal experience because I've never had redmite, so far I've been lucky. But I've bought a sachet of Ficam-W from my friend and have it stored away safely just in case.