SaraJean asked a question about peroxide...

[WaterWitchin]

Originally Posted by camille1585

I related question is why was it recommended in the past? 8-10 years ago here on the forum, H2O2 was frequently recommended to treat crown rot. There was no discussion about whether this was good or harmful, and it was standard advice, and not only here. I did treat one crown rotted Phal with it back then, with no ill effects to the healthy tissue (I know that anecdotal evidence is not scientific proof. Could be that the bottle wasn't new and the H2O2 had already slowly transformed into mostly water... I don't recall if the plant survived the crown rot)

Yet another good question. Yes, why was it a frequent recommendation? I've never used it on a plant, and had stopped using it on my kids boo-boos around 25 years ago. From what Ray says above about the 3%, it sounds mostly ineffective, as opposed to being caustic to the plant. Hmmmmm.

[Shadowmagic]

I couldn't do without hydrogen peroxide anymore. Bleach is just as important for me.

[WaterWitchin]

Originally Posted by Shadowmagic

I couldn't do without hydrogen peroxide anymore. Bleach is just as important for me.

Any scientific basis for that statement? I can't do without chocolate from time to time. That doesn't mean it's good for me.

Basically, I don't use H202 on plants or people anymore. Because in the last 20 years we've discovered it not only kills bacteria and "fizzes away" rot, but also destroys the good cells around the wound, whether human or plant. So it makes no sense to me to apply it to an already struggling plant, as it also kills off surrounding healthy cells.

Is it cheap? Sure. Does it always kill a plant? Of course not. Is there a better way to treat a fungal or bacterial infection that doesn't destroy healthy cells? Yep.

My personal view, I would never treat a phal for crown rot with peroxide. Having said that, my rationale for the couple of rescue phals I've been given that had crown rot was to put them straight to the trash. But I can certainly see where someone might attempt it. I just don't grow that way.

Here's an interesting article I just read about oxygen reactives as it relates to plants. Peroxisome Function, Biogenesis, and Dynamics in Plants | Plant Physiology Beware, it's a very boring read overall unless one's into that stuff, but it's basically saying the same about how plants cells react the same way human cells to H202.