Hi there! Spraying neem oil at night onto (and below) the leaves will kill those bastards. Atomizing essential oils in the air will help to keep them away. I use a DIY mix of LemonGrass, Peppermint, Eucalyptus and Lavender from a friend who work in a fragrance lab. I feel like this really helps, but I'm indoor, I'm not sure an atomizer would be efficient outdoor. Finally as mentioned by our friend
@DudeGrowsWeed, ladybugs can do the job for you. As for prevention, you can use a physical barrier / ground cover such as "SoilCover", "WeedBarrierFabric", "DiatomaceousEarth". Make sure your plants get a continuous cool breeze, spider mites do love hot weather and stagnant air. Hope this helps, keep us up-to-date and good luck with this invasion.