Ive been having the worst problems with Russet/Broad mite for a little over a year now. We grow organically so a lot of our options were limited.
We finally had breakthrough 2 months ago with Coveset a sulfur based spray. I have not seen 1 mite since our third application !
Anyone that has problems with these seeming impossible to control mites, I strongly suggest a sulfur spray!
I am positive they are still around which is why we are not stopping with the sulphur. If anyone is concerned with residue a sufrancant called ThermX 70 cleans the plants pretty well, although any sufrancant should work. Cheers and good luck!
ITs Cosavet-DE https://www.groworganic.com/oid-comm-cosavtdf-edge-sulfr-30-lb.html 1 Not Coveset…its was Friday and my mind was half way out the door.