How Much 3% Hydrogen Peroxide To Use As Soil Drench To Kill Parasitic Nematodes That Attack My Parsley?

Question

Or is 12% better? 35% is too hard to come by and you seem to have to dilute it by 1 part to 10 anyway, so doesn’t that just dilute it down to 3.5% anyway? I am in Austin, TX and my parsley plants, random locations all over the yard, so it’s not a “soil/fungus thing”, are beautiful one day, then the very next day wilt, die, have squishy roots. I suspect the rust fly, but don’t think they are IN central Texas?

Answer 1

I would use the 1 tablespoon per cup of water of 3% solution.

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/using-hydrogen-peroxide-in-garden.htm

https://www.gardeningknowhow.com/edible/herbs/parsley/diseases-of-parsley.htm