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I want a miticide that's safe to use in coco as a drench

You may remember me from such posts as this one, where I tried to identify these mites in my coco and rockwool and the consensus was that they were beneficial soil mites:

https://www.icmag.com/ic/showthread.php?t=328598

Let's say I want to kill them anyways, regardless of if they are beneficial or not. What miticides can I use safely as a coco coir drench that will kill these guys without causing undue damage to my plants?

I thought about using Avid since that successfully gets rid of most russet mites but those live on leaves and the treatment is on leaves and these mites I have are ONLY in the coco. I know this because I've taken brand new sticky traps and laid them flat just above the medium and shaken the plant vigorously and look on the sticky trap for the mites and I've never seen one, but when I just lay the traps down in the medium overnight and look at them the next day, there are invariably a few already stuck in the goop and a few crawling around the edge of the trap as shown in the video in the aforementioned thread.

So because of this, I need something I can primarily use as a coco drench that might also be able to get sprayed on leaves just to be on the safe side. I don't care what it takes I just want these bastards dead. Right now they are only in vegging mother coco pots and I'd like to get rid of them before I start another flowering run in rockwool.
 
Dr bronners peppermint oil soap

Add essential oils for liquid fire at a rate of 15ml/gal. Companies mix them for this purpose.

Fuck avid.
 
Dr bronners peppermint oil soap

Add essential oils for liquid fire at a rate of 15ml/gal. Companies mix them for this purpose.

Fuck avid.

Yeah I agree avid is a last resort for me and I'd rather not touch the stuff. I have actually used a mix of bronners peppermint soap with cedar oil in the past for fungus gnats, do you think that same mixture would do well on these soil mites or should I add some more essential oils besides cedar?
 

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