[Xylakant]

The article mentions the content is 500mg of oxalic acid / 100g and says the deadly dose is at 15 - 30g. That makes for 3-6kg of rhubarb leaves. Quite a serving, if you ask me.

In the original British understatement:

> Since a lethal dose of oxalic acid is somewhere between 15 and 30 grams, you’d have to eat several pounds of rhubarb leaves at a sitting to reach a toxic oxalic acid level, which is a lot more rhubarb leaves than most people care to consume.

[lostlogin]

That’s more oxalic acid than I’d have guessed.

Treating bees for varroa more takes about 25g of oxalic acid per box of bees. I’d kind of hoped the leaves might have more oxalic, then I could have tried putting rhubarb leaves in there instead of battling fumes, glycerine and strips of paper.

[progre]

Some beekeepers where I live put strips of rhubarb stalks in the hives to treat varoa. Not sure how effevtive it is though.