Do you have red mite or lice? Or another tyoe of mite?I’m on my 3rd permethrin treatment trying to get rid of mites/lice, and just this morning I see more crawling all over the decoy eggs again, so I guess another round of eggs have hatched. My ladies dust bathe in various places around the run, but our soil is mostly clay, so I’m wondering if it isn’t creating enough dust to be effective. Looking into mixing it with some sand.
Maybe you have a strain of red mite that is immune for permetrine. This happens a lot in my country. And people need another method to eliminate them. For farmers who sell eggs the permethrin and other poisons are forbidden (because of residues in feed).
If it freezes the red mites are not active anymore but eggs can hatch in spring again. Diatomaceous earth is part of the method I used. Maybe sulphur powder does about the same but I have no experience with that.
I had red mite last summer and had a few weeks with extra work. After a very thorough clean with detergent & adding special herbs in water and feed, & adding sand with some diatomaceous earth in the sand bath, painting the inside of the coop and the roosts with DE mixed with water. The joints and cracks were painted twice. The adult chickens who came in the nestbox got a bit on their back under the feathers too. I used rolls white ribbed paper/ cardboard to check daily. The mites were reduced a lot doing so.
One area got a few new mites almost every day (in the paper rolls) , I cleaned that area a second time after a week and found some eggs behind a piece of wood. Painted this area again with DE mixed with water. If you have lice in the ribbed paper rolls you need to heat them to kill the mites. About 15 seconds in the microwave is enough.