no sprays or poisons are going to work because of the eggs. predatory mites are definately the way to go. 4 years ago i had spider mites and got the preddy mites that fly. it takes about 4 weeks to cycle through-so not good if you're halfway through flowers-but they eat ALL the mites, ALL the eggs and then they eat eachother.

That being said, i had a patient that had thrips and got nemotodes from a place down in durango.