I am a new beekepper and have been using the FGMO method on my hives.
A nearby eperienced beekepper stoped over the other day so I asked him to inspect my hives for mites. That is probably why he stoped in. Anyhow he had trouble finding a mite. He said, "Yopu have to have some". I didn't know , for sure, what they looked like. Finaly he did find ONE on the plastic below the screen bottom board.
That is my testemonial to FGMO.