at the moment they are about 14 inches tall and yes i believe they are root aphids where you able to get rid of them?
I was able to eradicate. It took much effort. I had a heavy infestation. Plants were dying, quickly.
I basically finished one flowering tent up by doing soil drenches with Pyganic EC 1.4 and a little Azamax. The other flower tent, I just cut the plants down and said fuck it. They were about week 4 of flower.
Then I took clones from my mothers (that were still alive), dipped them in Pyganic Ec 1.4, and took them to another end of the house to root.
Then I turned my room upside down with an intense cleaning, very intense. I threw away a bit of equipment, not a ton, just stuff that was not worth cleaning as I already had so much to do. I sprayed down trays and resevoirs, after cleaning, with a cypermethrin spray. Ortho Home Guard. Let it dry while storing until i set up again. Then I washed them again to remove the cypermethrin. I also sprayed the walls of the tents and the room with cypermethrin, but left it to dry.
Then I bombed my room with Hot Shot Flea and Bed Bug, 3 times, on about three day intervals.
Then cleaned the room again.
Bombed again.
Then transplanted rooted cutting and treated them with Merit 75 (imid) at full strength.
Then reintroduced the clones back to the room to start the cycles again. I bombed a few more times while the clones were growing out to mothers. It shut down my grow for months.
I have not seen them in 2years. I tried to some half measures before doing all of this. I had them for months. Before I went with this plan, they were killing mothers and causing lots of damage to flowering plants. Treatments of Azamax only set them back for a few weeks. After about 3-4 treatments with Azamax, a treatment would only set them back about 5 days. I also treated with Takedown Garden Spray, as a drench. This also only set them back. A high strength drench of Pyganic EC 1.4, repeatedly, is very effective. But you have to treat with it many times. I ended up going through 3 bottles before the ordeal was done. But I had a ton of plants at that time.
I treated with Merit 75 as an extra measure. I think they might have not come back without it. But reading around the web, not many success stories are out there that do not include Imidicalprolid of some form.
Many people are really against Imid. If used properly, it is totally safe. To be real, if you purchase non organic produce from a grocery store... then you are exposed to it already. Just don't use it less than 65 days before harvest.
If you are seeing the root aphids, then your infestation is pretty bad.
Note: Pyganic EC 1.4 and Evergreen have the same two active ingredients, but different proportions
If you cannot afford Merit 75... I'll send you enough to do what you need. The bottle is like a lifetime supply. I'll never use it all. You'll need to acquire a label for instructions. google...