Any other soil drench for spider mites that is systemic? Beneficial bugs not cutting it

I am using SNS 209 which has rosemary oil/rosemeric acid. Spider mites bit the plant and get rosemeric acid and do not like it.

I am using that and have also watered with Spinosad - Al Bundy guy said spray with spino and water twice. I cannot spray because of ladybugs and just put persimilis aka spider mite predator.

The older lady at the bug store/hydro store for farmers, not really MMJ store, snapped at me. She said lacewing and ladybugs are useless for spider mites - they are only good for thrips. She said a ladybug would starve before eating a spidermite.

I released 1500 ladybugs 5 days ago and today I released 2000 persimilis. The problem with these predator mites is they like 70 to 80% humidity and I am at about 49%. Temp range 58 to 85 F which is where I am at. Cannot get hotter than 90 F and humidity below 40%. I doubt they can get the job done fast enough. I do not have any webs yet. I may water a little harder to try to get humidity up to 52%.

One poster here who is experienced said they do not work well under HID and I am using 1000 watt sodiums.

I have also added silica blast because it makes the plants a bit stronger. I was going to stick with spraying but someone convinced me to get ladybugs. I sprayed before hand.

I am about 6 weeks into flower. I may buy more SNS 209 as I will be running low. $81 a gallon for SNS 209 or $100 a gallon for rosemary oil. SNS has a small amount of rosemary oil but has anyone every used it for soil drench.

Someone said milk 10%/90% water is good for spider mites and also for watering your plants. I wonder if lactic acid gets in there and spider mites will hate it.

I guess I will just keep watering with SNS 209, some spinosad and silica blast. If the predator mites cannot do their job then they and the ladybugs are getting sponosad too.

Kudos to Capt Jacks for responding so fast. They said spinsoad will probably not kill the ladybugs.

Any suggestions appreciated.

Article here on spinosad as a systemic soil drench for spider mites. Just like the Al Bundy avatar guy said. The sthing wth spinosad is you supposedly should not overdo it.

http://www.ncbi.nlm.nih.gov/pubmed/16180075

Liquid Worm Casting? WTF is that?

http://boards.cannabis.com/threads/no-more-spider-mites-on-cannabis.204542/
My bud told me about this Liquid Worm Casting product called peak soil. He dilutes it 15 parts to 1 parts juice, for a soil drench, once every 3 weeks. They just go away... Thing is he's got cats and dogs running all over the place, so I was surprised when I paid him a visit to take a look. The brochure says its all about pushing Brix levels up so the critters just fill up with gas and have to look for greener pastures or starve. I have used Neem, and it works for a while, but it makes sense to get rid of mites from the inside out. So now I'm a believer. Extreme plant health is all you need to be rid of the scourge. I got some at Grofax on Colfax in Denver, kind of funny, looks like it's in yogurt containers or something, but apparently good things can come in janky packages too. Now the only neem I use is in my toothpaste. Dang tar stains.

scatbrewer, Sep 25, 2013

https://www.google.com/patents/US20020090669
Patent on Liquid Worm Castings as a repellant

Testing has shown that the natural level of chitinase found in most plants is not sufficient to repel insects. The level of chitinase is multiplied to a repulsion level with the use of worm castings. Liquid worm castings can be used as a foliar spray to administer a concentration of chitinase topically to the leaves and stems of plants. Liquid worm castings give a temporary repellency effect that can be effective to keep the insects away until the level of natural repellency is increased in the nectar of the plant. Worm castings can also be added to the hydroponic feed liquid for plants to provide sufficient level of chitinase to repel insects.

https://www.rollitup.org/t/best-spider-mite-cures.467890/
I use worm castings like crazy and never had an infestation of spider mites since I started using it. I spray worm tea on top of my leaves and underneath my leaves once a week. I also water with worm tea once a week and take the wet balled clump of worm castings out of the panty hose from which I make worm tea with and spread the wet castings over the soil as a top dressing.

I found this.
http://www.coloradogrowerssupply.com/Natures-Big-Bud-Premium-Worm-Castings-1-Gallon_p_1577.html