Quote Originally Posted by khyberkitsune
If you have this problem, the best treatment is not a systemic poison, but to absolutely shatter the reproductive cycle.

Soil: bottom of pot should have an inch-thick sand layer or more, top of soil should have the same. This stops flies from escaping to breed in the air, and stops insects in the air from laying eggs into the soil or burying into the soil to get to the roots.

Hydro: Not as often found in hydro, but can happen in coco/hempy buckets. Seal the bucket, that's about all you can do before resorting to a poison.
Actually that wouldn't do shit to these bugs. They actually have like 10 life stages and at certain points they are born pregnant and they can actually reproduce asexually. So, they're a bit more difficult to eliminate than that.

By the time you see winged flyers you have a full-blown infestation. They only grow wings when they're population is too high in one location and they need to spread out. They typically exist as non-winged aphid-type bugs and they eat your roots.

I've lost one of my plants to this, but I think I've stopped them for now. Hopefully the rest will be OK.

I will try to post pics of the damage when I have time. Basically at day 25-30 of flower the fan leaves are already yellowing severely.