I have about 30 Boston fern in the greenhouse. I have tiny white specks on the fronds. They are to small to b mealy bugs. The leaves on the fronds slowly turn yellow where these white things are. I've tried insecticide soap and water, Dawn and alcohol on them. Neither seems to total get rid of them. I've also sprayed the base of the ferns
Livingston County Kentucky ferns
Thank you for your question. It is very difficult to diagnose an insect infestation and help with treatment without a photo. With all due respect, some home gardeners mis-identify them. You can either send photos here, or send/take them to your county Extension office: https://livingston.ca.uky.edu/ Good luck!