Does using H2O2 and water to cure plant of gnat larvae hurt your plant???

Anyone know??

i need help. i also have gnats...

im not sure but i think i got the same problem. i got little white magget looking things that leave black spots. and i have no clue what they are.

I don't know anything about H202 but Predatory Nematodes (tiny worms) will kill fungus gnat larvae in your soil. and yellow sticky tape can get the adults.

Fungus gnats are more of a nuisance though and won't harm your plats if they are mature, I think they can stunt seedlings though.

I'm not sure what your talking about keveners, got a picture?

Only if you use too much. H2O2 breaks down quickly, just step up how much you use each time you water. You're looking for a LIGHT foaming on the top of the soil, after a few times of that the gnats will be gone. Biggest risk is using too much and giver her a quick scorching.

I had to perform this recently on a few plants...some took it well but two of them were pretty far beyond repair. I think the gnats got to them before I could get to the gnats. I'll post a couple pictures as soon as I get them on my comp. I used 1 PART H202 (Hydrogen Peroxide for newbies) and 4 PARTS of H20 (water) and just watered each one till the foam came up about 1/2" to 3/4" above the soil. Then I just let it drain.

I'm still holding on to my sickest babies (2). Gnats are 98% contained...every so often I see one flying around but it is nothing compared to the invasion I had before. Due to too much moisture in the soil (overwatered). Live and learn and keep on growin

Happy Growing!

Here is one of the plants that got invaded. I'm still reviving it. But...IT...JUST....MIGHT...WORK The other one which I still need to get a pic of looks like its about to be in need of some life support.

Silver Haze - Gnat Damage

I'm getting some lady bugs tomorrow.. do they help with gnats at all? Those gnats are bastards! I've done the potato trick.. and I've removed quite a few larvae but the gnats keep coming back. I have sticky traps everywhere and they have caught a ton of them.