[nksv]

Neem meal. Did one or two waterings with neem oil. Top dress neem or mix with soil.

[KIS]

https://mlachapell.com/

[Alt_organix]

Botanigard has worked for us before on a bad infection. Use it as a soul drench twice 72 hours apart.

[VerdantGreen]

adding neem meal to the soil will prevent them, and it is a good fertilizer. i use 2-3g meal per litre of soil.

for existing plants try topdressing.

but yeah i would throw the soil away and start again for any new plants. good recycled soil is quite precious, but recycled soil infested with pests is just a liability.

VG

[redlaser]

.

[moses wellfleet]

Seem to have had some success with macrocheles robustulus soil dwelling predator mites. Very similar to hypoaspis miles but they have a wider range of prey.

[growinthehills]

Have you tried Doctor Zymes, Nukem or Big Time Exterminator? I never tried any of those personally on root aphids but, I noticed that big time had a rate of only 5ml per gallon for soil applications and gave it as a suggestion to a couple customer when I worked at a garden store. One customer had root aphids on Dahlia's or some ornamental flower and the other was using it for cannabis and both came back and told me it really knocked them down.

I haven't had root aphids since those products came out otherwise I would definitely try it out. I did use it in between runs on recycled soil as a preventative and to maybe lower the population of russet mites hanging out in my soil.

[SICE]

They attacked some plants real bad.

I started applying been meal and they seem to respect the plant more... Not killing it as fast

I'm going to add some hydrogen peroxide to experiment

Anyone try watering with chilly water? Maybe it works like it does on spidermites

[DeluxeBerry]

Cold water works against spider mites? Tell me more, ive never heard of that one.

[CareStaker]

Cold water and Spino dispatched my mites in two sprays. Granted it was in winter, and I caught it early. The males were visible for about a week to 10 days after the second spray, but no females...and knock on wood they seem to be gone for the last two months.